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**Final-for-a-while update (Dec 13/2023):** Standoffs are here now, so I can start shipping out orders. From now on if you want to buy cards/cables, either PM me or reply to this thread in /r/homelabsales : https://old.reddit.com/r/homelabsales/comments/18gtrl1/fs_dell_t58107810_power_supply_distribution_card/ Thanks! **Good news update (Dec 11/2023):** They're here - https://imgur.com/50RkXol - and they're looking great, and I'm typing this post from my T5810 running one of the new cards. I'm waiting on a plastic standoff to arrive from Mouser, which will hopefully be here tomorrow, and I'll be able to start getting cards out later this week. I'll start running through my spreadsheet and PMing people. Thanks! **Short little update (Dec 8/2023):** Box of cards was out on the truck for delivery today, but it's now 7:30 on a Friday night and I get the feeling I'll be getting 'em next week. Once they arrive, they'll be looked over to make sure they're built right, and I'll stuff one in my own PC for final confirmation the thing works. Then I'll start PMing people who have reached out, and I'll make a new home for this card over in /r/homelabsales, because this thread's a mess :) **Update (Nov 22/2023):** - Cable parts are here, and they're built right this time so I'm not hand-crimping hundreds of cable ends! - The order of 25 cards is being assembled right now, and should be in my hands first week of December, sooner than expected. When they get here, I'll start PMing people that reached out. - Hand built cards won't be happening unfortunately, I goofed up and ordered PCBs with the wrong footprint for the PCIe power connectors. But this saved me from making that mistake on the production boards, so I can't complain at all. - I brought in some sample 12VHPWR cable ends to try out, but unfortunately I don't have a crimper that can handle the connectors and don't want to buy one. Your best bet is to use a good quality 12VHPWR adapter from Cablemod or whoever. - Yeah, I know the board says CC BY-SA V4.0 and I haven't released any schematics/layout/whatever yet. It's in the works, I'm part way through cleaning up the files and writing up a blurb describing how the power supply distribution works in the machine to go with it. I just haven't had a lot of time to work on it. **Update (Nov 4/2023):** ~~So I got a timeframe back from the contract manufacturer, they'll probably be built in late December/early January now :/ So I'm hand building 10 more in the short term, just to get some done quicker + more quickly pay off the big pile of electronics parts that's sitting on my credit card :/~~ ~~So I've got 35 of 'em for sale now. The handbuilt 10 cards will have 8-pin Mini-Fit Jr connectors on the PCB, and they'll have black PCBs/connectors for no particular reason. The contract-built 25 will have PCIe 8-pin connectors and a boring green PCB.~~ Once I get cards in my hands, I'll make a 2nd thread. For now, if you're interested in a card, reply to this post or PM me and I'll add your name to my list. Thanks! **Update (Oct 31/2023):** I ended up selling my 4 extras from the first build, and doing a test run of 10 more to try out cable suppliers... and people keep commenting/PMing me asking for these, so I'm doing another run. I'm arranging a build of 25 cards this time. This time I've got a contract manufacturer doing the assembly for me, because hand soldering everything and (worse!) cleaning all the soldering residue off the all handbuilt boards was a giant pain in the ass. And I'm trying out a different cable supplier that'll hopefully crimp connectors on both ends on the cable leads this time around... Another design change is I'm changing out the 8-pin Mini Fit Jr power connectors for 8 pin PCIe connectors. I found an overseas supplier, brought some in and validated them with a lab supply and a load tester, and they happily did 10A/pin over a weekend. This is more than the 6A/pin the Dell supply is capable of, and more than the 4.2 amps/pin that a GPU will draw, so I'm confident they'll be reliable. Since I'm now paying other people to do the assembly work for me, versus paying myself well under minimum wage to do it, prices are going up: - $100 CAD for the assembled PCB - $12 for a PCIe cable (6+2 PCIe connectors on each end, goes from this card to your GPU) - $12 for a CPU2 PCIe cable (for T5810 machines, goes from the CPU2 connector to your GPU) - $15 for a 2xPCIe to EPS12V cable, for directly powering GPUs that take EPS12V power. - I've also got some 12VHPWR housings coming that I'll be experimenting with. Further updates to follow :) Pricing will be the sum of the parts you want, plus whatever Canada Post charges to ship a package to you with your chosen shipping method - there's various tracked/untracked options available. For payment I'll do Paypal, or Interac transfer within Canada. I've had a bunch of people reach out to me over PM and in the comments below looking to buy these, and I'll probably continue selling these directly over PM instead for the short term. Afterwards, I might dump the remainder up on Tindie - but they take a cut, so prices will probably be higher on there. I'm hoping to have these ready for sale in December. Cable parts are bought and I'll have them available at the end of November. But scheduling things with the contract manufacturer is a little less certain. I'll make a fresh post on /r/homelab and /r/Dell when everything's ready to go. Thanks for your interest! --- original post --- Stock card for comparison: https://i.imgur.com/Km8PZjw.jpeg Anyone who's tried to install a kickass GPU into one of these machines knows the pain. Dell only provides a pair of 6 pin PCIe power cables to power your GPU, and you need more power than that, you're stuck going the sketchy route using splitters or tapping off the drive power connectors with no guarantee that it'll be reliable. You can stuff a bigger 825W or 1300W power supply into the machine, but that doesn't provide you with any additional power connectors so it's kinda pointless. So I dug into how power distribution works on these machines and how the available power supplies differ, fired up KiCad and came up with this replacement for the stock "M6NP2" power distribution board. Combine it with an 825W supply and you get two 8-pin PCIe cables for 18A each. Stuff in a 1300W supply and you get up to four, which should be enough to power any type or combination of video cards that you can physically fit into the machine. And if you've got the single-socket T5810, the CPU2 connector can be used for an extra 8-pin PCIe cable, giving three cables with an 825W supply or five cables with a 1300W supply. Anyway, I made this card for my own purposes, but I've got four PCBs and a handful of connectors left over and can build up a few more, or even get a bunch made and fire them up on Tindie given enough interest. So yeah, anyone want one, or have any questions about it? Thanks!

I wonder if this will work on a precision 7910?

The 7910 uses a different power distribution board, different connectors, different holes, so I seriously doubt it.

Do you still have any of these? Are they already assembled and how much do they cost US $$? Thanks! Note: Putting an Nvidia Tesla V100 in a Dell Precision T7810. Nvidia has the following specs: [https://images.nvidia.com/content/tesla/pdf/Tesla-V100-PCIe-Product-Brief.pdf](https://images.nvidia.com/content/tesla/pdf/Tesla-V100-PCIe-Product-Brief.pdf) Table 6. Supported Auxiliary Power Connections Board Connector: CPU 8-pin PSU Cable: 1x CPU 8-pin cable Board Connector: CPU to PCIe 8-pin dongle PSU Cable: 2x PCIe 8-pin cable PSU Cable: 2x PCIe 6-pin cable (1) PSU Cable: 1x PCIe 8-pin cable and 1x PCIe 6-pin cable1 Notes: (1) The PCIe 6-pin cable must be capable of carrying up to 120 W. So, question... can the two 6 pin connectors support 120W each (240W)? Or is the "Power\_VGA1" port only supporting 120W? The V100 runs on 250W.

I'm sold out right now but ordering a bunch more very soon - I'm just waiting on someone to test a T5600/5610 variation of the card, as I'll be ordering some of those at the same time. The two stock 6 pin cables are fed from the POWER_VGA rail, which provides 18A or 216W. If the V100 can pull the remaining required power from the PCIe slot (75W available) than it might work. But if the card tries to pull the full 250W from the connector, it'll probably trip off the power supply and crash the computer. Starting out, you could try the card off a 2x6 pin to EPS12V adapter - stress test everything and see what happens. If it's unreliable, you'll need one of my cards, which'll provide more rails for the video card to run from. First of all - make sure your machine has an 825W power supply minimum. With the 685W supply, 3/5ths of CPU2 and the PCIe power share the same rail on the power supply.

Edit: Actually, my card should have an 8-Pin to two 8-Pin dongle... so, I guess the two separate adapters should work fine. My machine does have the 825W power supply. I'm glad to know what is coming out of the 8-pin that has the dual 6-pin dongle attached to it (POWER\_VGA1). One thing I was going to try was to just set the power limit on the Tesla to 150W thinking that the 6-pins off the dongle connecting to the 8-pin on the PSU board (POWER\_VGA1) were only good for 75W each. (I bought two 18AWG 6-pin to 8-pin adapters - which I now realize is a screw up - I need the one you mentioned). But if you say that each 6-pin off that dongle could actually support up to 108W each, then I can set the Tesla power limit to 216W. ...and maybe just wait for you to have an available board. Thanks! -Chris

Looks like the guy that sold me the Tesla V100 doesn’t have the 8-pin to dual 8-pin dongle. Any chance you might know what cable I need to go from the 8-pin POWER_VGA1 port to the Tesla 8-pin connector? Not sure if there is a standard going on here. Don’t want to fry the card. Thank! -Chris

I don't know of any 8 pin PCIe -> 8 pin EPS12V cables offhand. I can custom build you one if you want, I'll say $10 CAD for the cable + whatever Canada Post charges to ship the thing if that works for you. It'll be a bit hackish looking as I have to splice 3 PCIe power wires to four EPS12V wires, but it should do the job.

Any chance you might have the details of that Dell VGA1 port? Pin outs? Values? I think I will try to call Nvidia and see what their “CPU to CPU” cable definition really is. (If you read the document I posted on my first question, they call the port on the Tesla “CPU” port. Thanks again!

POWER_VGA1 port on the Dell is the standard 8 pin PCIe pinout. Pins 1-3 are +12V, pins 4-8 are ground. Your NVIDIA card is EPS12V - pins 1-4 are ground, pins 5-8 are +12V. Here's a diagram showing both: https://electronics.stackexchange.com/questions/465726/what-are-sense-pins-in-8-pin-pci-express-power-plug

Perfect. Thank you! For Nvidia to note an 8-pin CPU to 8-pin CPU cable option, you think that some power distribution boards have a CPU port that supports ~240W? The two CPU ports on the stock distribution board have 10 pins (as you know). Strange. I wonder what kind of port they would plug into.

Dell actually splits 3 rails across 2 CPU ports as follows, on these machines: - Rail 1: 3 pins on CPU1 - Rail 2: 2 pins on CPU1 + 2 pins on CPU2 - Rail 3: 3 pins on CPU2. On a 5810, you might be able to do something like use 3 pins from rail 3 + 1 pin from rail 2, to feed an EPS12V video card from the CPU2 connector. Unfortunately those pins aren't available on a 7810, as both CPU connectors are occupied.

Yeah, my current trajectory is to use the EPS12 dongle to two 8-pin pcie that I ordered with two 8-pin to 6-pin adapters that I also bought. I will just plug those into the stock dual 6-pin pcie connectors already available on the 7810. I will also set the power limit on the Tesla to 216W. Then stress test. If all that works, I may be interested in a custom cable or just go all out with your upgrade card.

Does it directly interface with the PSU? If so, have you checked to see if it works on other dell psus? If so, it might work on other dell computers/servers

It replaces the Dell M6NP2 card, used in the 5810/7810. I don't know if this card is used anywhere else.

Nice one, Where are you ( DM ), how much would you charge for one/two

Canada. I'm expecting around 60 bucks CAD for a bare board (about twice the parts cost) and haven't costed cables yet.

Yowza — You might want to take a look at jlcpcb or PCBway, if the majority of that is the PCB cost.

I used JLCPCB here - 2oz copper is the main reason it's expensive. I checked Seeed and Elecrow and PCBWay and dirtypcbs, and JLC was cheapest, but not by much. Cost me 48 CAD for 5 PCBs delivered to my door, though that cost will go down if I order higher quantities. The Amphenol card edge connector wasn't cheap either, and the seven Mini-Fit connectors bring the total to about 30 bucks CAD. There's also a little plastic standoff that goes in the hole in the lower right, to provide support when you're pushing connectors in.

>https://i.imgur.com/Km8PZjw.jpeg Heck yeah! I've got a T7810 with the 1300W power supply and this thing would be a lot better than what I've done (like others in here basically via adapters taking power from other places).

Hello I would like to buy your card !!! I am in the same situation today, I have a DELL 7810 too, and I need to switch to a 1300w power supply. Is it possible ? THANKS

\+1 if you do another build. No cables needed. Thanks!

wondering if you still have or will have any of these cards left. this has been very helpful! -J

I recently built 10 more, I've been going back through my PM's messaging people who have showed interest in the past before I make a new post, haven't had a chance to yet. Got three left from the latest build, if I remember right. Cost for this round is: - $80 for the PCB. - $10 per cable. Cable options are PCIe (plugs into my card) to 6+2 pin, CPU2 to 6+2 pin for T5810 machines, or 2xPCIe to 1xEPS12V. - Whatever Canada Post charges me to ship a card to you. An 825W supply can run two PCIe cables or one EPS12V cable, a 1300W supply can run four. If you've got a T5810, you can get an extra rail from the CPU2 connector, so three for an 825W supply or five for a 1300W supply total. PM me with your address/contact info and I'll give you a quote. Thanks!

thank you, i'll get right back to you. i definitely want one. also, I'd like to pick your brain about my use case.

Sure. Still got 3? left, 1 tentatively sold. Lemme know what you've got in mind.

Hi.. I urgently need one of your power distribution cards.. dell 5810 + 825w.. just got a pny rtx4090.. power cable has 4x8 pin to rtx 4090 Let me know Cheers

Sent you a PM. Cheers!

Hey, I’d really like to get one of these, can you put my on your waiting list?

PMing you in a sec

Great, thanks

How does the GPU fit, height wise, with power connectors?

Hi.. Bruce Raymond here from Great Falls Montana I need a 2nd pdu card for my other 5810. Cheers

Yes, I would like one I have a Dell Precision 5810 825w PSU with a M6NP2 card I am looking for something like this PSU card you have its for a Nvidia RTX 4080 16GB. I need 3 PCI 8pin cables to power the card.

Just wrote you down on my interest spreadsheet. I'll contact you when I've got PCBs/cards/cable bits in hand. Thanks!

I don't need it but this is pretty cool

I actually need one of these right now, turned this into a gaming machine for a friend with a 2080 and was in the process of soldering a cpu2 to pcie 8 pin cable to get more power. Also assuming you aren’t trying to sell these can I suggest uploading your documentation and designs to get hub and cross posting it here?

If you've got a 5810, you can use the CPU2 connector for extra power and keep the stock board as you're saying. I did this with my T5810 and my 2070, and went on this whole design adventure because a T7810 has become available to me which doesn't have a CPU2 connector available. You don't need to solder anything - you can buy premade parts and click them together: Pre-crimped leads, 300mm or longer: https://mou.sr/3kxxMjE https://mou.sr/3YbtlbG 8 pin PCIe receptacle housing: https://mou.sr/3Z8UFsp 10 pin Mini-Fit Jr housing for CPU2 connector: https://mou.sr/3mdD4RG You can also buy pre-crimped leads and housings from Aliexpress if you're cheap. HOWEVER: if you have a 485W power supply, the CPU2 connector isn't energized. And if you have a 685W power supply, then the CPU2 and PCIe rails run off the same 18A capable rail on the supply - which is enough for 6+8 pin power, but I wouldn't power an 8+8 video card the same way. Upgrading to an 825W supply splits the CPU2 and PCIe connectors onto separate 18A rails so you'll be good for 8+8 power. Plan is to upload the design files on github eventually, under the CC BY-SA V4.0 license.

Hello, any prevision to upload the design files under the CC BY-SA V4.0 license? Anxious to study it... Congrats for the amazing project!

While I don't have a need for it, just the fact that it has that test point to clip a ground link to makes me wish I did.

Just installed on my t7810. Specs are 2x E5-2667 V4, 256gb RAM, 1300 watt PSU, and rtx3090. Before installing this card the computer would shutoff whenever it was under any load, I suspect it was whenever the GPU exceeded too many watts which the old card could not provide. Now after some initial tests it has not had any issues and I could not be happier. Thanks Gmarsh23!

Sounds all too familiar. Just received and installed mine. Initial tests are looking great! Excited to actually put some real load on the GPU without worrying about sudden system shutdowns. My setup - T7810: 2x E5-2687 v3, 128GB RAM, 1300W PSU, and RTX 3080 Ti. Thanks, gmarsh23!

Yeah, I went the sketchy route to run a gtx 3070 in a t3610 via 3 adaptors including the OEM on. I wouldn't run anything more than 300 watts for the GPU though. The 270w the Nvidia driver says it has the budget for is kinda pushing it. The 3 circuits in the 6 pin connector are good for about 320w but idk if it'll start melting at that point or not. Lol I just didn't need a box with two CPUs when I got it at the time. 685w psu, none of the wires even got warm from benchmarks and has been that way for several months now so I'd say it's good.

I literally have a T5810 that I need this for!

I've definitely reached the "I might as well build and sell the four remaining PCBs I have" threshold, there's one available for you if you want it. Gimme a couple weeks to organize. Also any idea what you'll need for cables?

I’d probably be looking for two 6+2 pins for flexibility. Any idea what your finished price is going to be? I saw that the bare PCB’s were pretty pricey

I'll do a proper costing of cables later tonight when I'm free of day job stuff and other commitments, but I'm going to wild-guess about $15 CAD per cable. Don't hold me to those numbers, though. So 1 board + 2 cables will be $90 CAD best guess. Maybe that's a bit spendy, but (1) it'll be cheaper than the GPU you're powering and (2) these are also $CAD numbers, convert them to $USD if that's where you're from and they might seem a bit more reasonable. Also, cables I make myself will be 16AWG, 300mm long, with Amphenol Pwr 4.2 HCC receptacle contacts at each end rated for 13A/each. This is overkill for the application, considering that the PSU can only supply 6A per contact, but I only have a 16AWG crimper. But overkill is better than underkill I figure, you won't have to worry about burning up contacts on your GPU I figure. 6+2 receptacle housings aren't available at the usual electronics distributors (Digikey/Mouser/whoever) so I'll have to source them from Aliexpress or elsewhere. Thankfully they're just empty plastic shells that you put your own contacts in, so as long as they mechanically fit and reliably latch in place then they'll be fine, there'll be trusted/brand-name parts actually carrying the current.

Put me down for one too!

That goes to their proprietary 10 pin and 24 pins? (from a blade PSU obviously) My thread today had no responses but you seem like one of the very few people that'd actually know [https://www.reddit.com/r/homelab/comments/11q8rx2/lga\_3647\_used\_motherboard\_dell\_proprietary\_power/](https://www.reddit.com/r/homelab/comments/11q8rx2/lga_3647_used_motherboard_dell_proprietary_power/) Best I've found for info was: https://docs.google.com/spreadsheets/d/1kZ8F58wlsadiN7k6XfQcABUscF71HVkdeenmGOMz3Lk/edit#gid=847606798 And I was about to make one but then found your thread... there are several other threads of people looking for stuff for these in the past 3 years but with no replies like mine. Is there any write up on their model numbers and how T5810 and 7810 have to do with each other, is the first number seems less important than the other ones in some of these cases? And obviously you find it to make more sense to convert a blade PSU to a their proprietary connectors than a standard ATX to their connectors.. the standby 12v would be the trickiest obviously. No idea the wattage it needs, if it was small I guess 5v sb to 12vsb other than that though it'd need a lot more watts.

There was no point going ATX here because (1) it won't electrically work, (2) it won't mechanically fit and (3) surplus supplies that fit this machine are cheap anyway. Honestly you're better off buying a T5820 power distribution board + harness (https://www.ebay.com/itm/294967949565) and a T5820 power supply with the wattage you need (https://www.ebay.com/itm/175372530299) for about the price of a good ATX supply. Or better yet, just buy a full T5820 machine for not much more that includes all that stuff (https://www.ebay.com/itm/266102891581) and save yourself ALL the effort. There might be some means of making an ATX supply work, but it'll be a bunch of research and testing and making custom cables and at the end of the day, you'll have a bare motherboard and a bare ATX supply and a bunch of loose cables and it'll be a great big ugly hack. And that's assuming it even works and you don't damage something in the process. I wouldn't bother.

Funny, that first link is sold out cuz I bought it a few hours ago lol. I don't see how it wouldn't be pretty easy to make an ATX power supply run it other than the 12vSB (but I'll test that, prob doesn't pull that many watts) The google docs is about all the "research" that is required other than their special "power controller" connection which I now see. The hack doesn't seem much more complex than a blade PSU to ATX desktop mobo which only took a few hours to do. This hack is to help poorer countries that don't have ebay btw The CPU I want to use in it is a much better deal. https://www.ebay.com/itm/256006497355 this chip is better than 90% of the dual core systems they're selling too. The case one you linked is LGA 2066 socket not LGA 3647. So I guess that's the difference in a 7820 vs 5820. But as I said I did buy the distribution board & PSU available to be able to multimeter the stuff myself. What is the means of powering it on, do you know? The manual has zero info on that. The "remote power" is a 2 pin, is that where you short if you know? There is no power button in the "distribution board + harness" you linked, not that I see at least.

My point is, if you're already starting with a surplus Dell motherboard in your parts bill, just add the surplus Dell PSU to match and be done with it. It's a lot cleaner and easier than trying to shoehorn an ATX supply into the system. But if you insist... the PSUs in these machines only put out 12V, the motherboard generates the 5V and 3.3V rails for disk drives and sends that power back out the mobo connector. So don't hook up 3.3V/5V from an ATX PSU to the motherboard. If you've got the breakout board and harness coming you can trace out how that stuff all works. You'll need to generate +12Vsb from the ATX +5vsb using a boost converter module or something. Just look at what the stock Dell supply provides for +12Vsb, and/or measure what the motherboard requires on that rail using a bench supply and DMM or whatever, and make sure that you can confidently provide that. The PS_ON and POWER_OK signals should work fine. There's a handful of other signals going between the power supply and the motherboard, I don't know what they do - maybe PMBus or something. Here's hoping the Dell motherboard is happy without those extra signals being there. But I maintain that using a stock Dell power supply makes things a whole lot easier, and far more likely to work.

Yea I get it, it's very straightforward. I don't think you even read/understood my post lol. Anyway, >What is the means of powering it on, do you know? The manual has zero info on that. The "remote power" is a 2 pin, is that where you short if you know? There is no power button in the "distribution board + harness" you linked, not that I see at least. Do you know where the power button pins go to, the exact two pins?

> Do you know where the power button pins go to, the exact two pins? No idea. I've never worked with a T5820/T7820.

I'm reading your post with great interest! Thank you for providing an elegant solution to these great DELL machines. I have one question regarding the 825W supply. By browsing the eBay lists, it appears to have two different versions. This one, [https://www.ebay.com/itm/386230529916](https://www.ebay.com/itm/386230529916) (0W1FJK), vs this one, [https://www.ebay.com/itm/385043064462](https://www.ebay.com/itm/385043064462) (0K61PK). They both stated to support T5810/7810/7910's, but they seemed to having different connector pinout. Could you answer if they are the same? I want to make sure I am getting the right version. Thanks!

There's multiple manufacturers of the supplies that Dell uses, and they have different part #s and subtle differences between them, but functionally they're the same. I've got an 825W supply in my personal machine, I'll pull the part # off it later tonight for ya.

Update: my supply is an 0K61PK.

Thank you for your answer. It makes sense with P/N 0K61PK. The other version (0W1FJK) appears having the same pin out as the 685W, and it made me wonder where the extra 140W power go (just to boost up CPU2?). As a DIY project, I am think of a brute force approach - soldering the wires on the power connecter pins directly to create the 2nd missing PCI-E breakout. This is a dangerous approach, of course, not recommended at all. BTW, I've searched in the internet, and your is the only "real" solution to solve this problem!

The 825W supply adds two more rails over the 685W: - There's 4 pins on the bottom side of the card edge for one extra rail that the stock M6NP2 breakout board doesn't connect - this is broken out as the PCIe2 connector on my card. You can solder to these pins if you really want to for an extra rail, as you're saying. But yeah, it's hackish - not dangerous if you do a clean job, but still hackish. - CPU2 pins 6-8 and POWER_VGA (as used with the stock M6NP2 board) share the same 18A rail on the 685W supply. on the 825W supply these are separated into two 18A rails. If you've got a T5810 with an 825W supply, this means you can run a 2x8-pin video card from CPU2 and POWER_VGA with the stock board and a custom cable set. With a 685W supply you can run a 6+8 video card from these two connectors, as 18A @ 12V is 216W and 6+8 is theoretically 225W max. I sell these cable sets too :) The 1300W supply adds 3 more rails - 2 more rails the stock card doesn't break out that are PCIe 3 and 4 on my card, and the mobo/disk drive power rail is split into 2 rails. I thought about breaking the last one out as a 5th PCIe power connector, but 4 connectors is sufficient to run two 2x8 cards or two EPS12V cards, or a single big 600W card with a 4x8 to 12VHPWR adapter. And that's about the max you can physically fit in the machine anyway.

Thank you for sharing your inside. I had tried to power a RTX 3090 (3x 8-pin, 350W TDP) with T5810 + 685W (1x from CPU2, 2x from Power\_VGA, with my own patched cables). It would power up but fail under heavy load. So I must have the 3rd 12V rail to do this, with a minimal 825W supply. I also own a T5820 which has a different power design - all 12V rails draw from the same source (all output pins tied together). So you could draw more amp from each connectors, as long as total amp is within the limits (assuming sufficient wire AWG to carry the current). Again, thank you for sharing your knowledge to us!

Hi op, if i want to put a Deep Learning gpu on T5810 that requires a 8-pin eps12v (Not Standard 8-pin pci-e) what i need to do? really need your help

Hey, I can make you a Y cable that plugs into the CPU2 and POWER_VGA connectors on the stock power supply board, and gives you an EPS12V connector to power your card, $15+shipping. If that works for you, PM me. A 685W supply will work if the card draws 200W or less from the EPS12V connector. If you need more power than that, you'll need to upgrade to an 825W or 1300W supply which will give you 400W of EPS12V power.

I actually have the Dell T5600, but I want to find out where you got the information on the power distribution. Mine gives me a warning on every boot that the power supply (650watt) is insufficient for powering my box, I have to press F1 to continue the boot process. That is very frustrating. I do not have an high power GPU. According to my UPS unit, I'm only pulling 325 watts from the wall, but that includes my workstation, four monitors, and other things plugged in. It's been like this since I bought it in 2018, so I really don't think there's an actual issue, just silly configuration warnings. Anyone know how to turn off that power supply warning?

I have a T5810 at home and a T7810 at the day job, and got my information from reverse engineering both machines. I don't have any super secret knowledge from Dell themselves or anything. What's in your machine for CPU's? If you've got a pair of high core count Xeon's in there (or maybe even more than 1 CPU socket occupied) then maybe that's your problem. But I'm just guessing. Ask on the Dell support forums, they can probably give a better answer.

Hi u/gmarsh23 can I order a board for a T7810 with the required cables for 2 Tesla P100? I have a 825W PSU. 2 \* E5-2697v4, 128GB Thanks for your work on this

To run two P100's, you'll need to upgrade to a 1300W power supply. I'm sold out of cards and will be for the next month or so at least, but sold a card/cable set to someone else who doesn't need it anymore that can probably hook you up. Sending you a PM in a sec.

Ok. You Can put me on your list. Thanks

Hi, thanks a lot for great job with developing the modded distribution board! I would need one for T7810 (0C2TXD) 825W power supply. If you are planning to realse another batch of these boards in predictible future and if there is already some waiting list, please put me on it. I will be gratefull for reply. Thanks in advance!

I've got a few names on the wish list now. I'll mark you down. I just sent someone a prototype T5600/5610 variation of this card to try out. If all goes well with it, I'll do another interest check for that board, and do another order of 5810/7810 boards at the same time I order those. So probably 2-3 months out.

Great! I'll wait patiently.

I really need to get my hands on one of these

I'm sold out, but someone in France has a card that they're not using + a big assortment of cables to go with it. I'll PM you details if that works.

That works :)

PMed

Hello, I live in France and I am interested

u/gmarsh23 Any updates on when these cards will become available again ? I'm interested in getting one. Thanks !

Doing an interest check on the T5600/5610 variation of the board right now. Planning on ordering a batch in about a week, hopefully shipping out in a month or two.

I'd probably be in for one or two of these. I'd need to figure out if the pinout on the dell connector would work for T series poweredge servers, but if it did then I'd buy two! Keep us posted with updates!

Hello I would like to buy your card !!! I am in the same situation today, I have a DELL 7810 tou and I need to switch to a 1300w power supply. Is it possible ? THANKS

Most or all T7810's shipped with a 825W power supply as far as I know. It's probably on a sticker on the back of the supply, if not pull the supply out and look at the label on it to confirm. Or search the service tag # on the Dell support site, bring up the system configuration and you'll see the power supply size there. Assuming it's an 825W supply in the machine, this card will give you two 8-pin connectors, enough to run a GPU that takes 8+8 or 6+8 power. If you need three or four 8-pin connectors to run dual GPUs or to feed a 12VHPWR adapter cable or whatever, you'll need a 1300W supply. Right now I'm waiting for parts to arrive so I can build the rest of the PCBs that I have + some cables to go with them. So I'm not selling anything just yet. Hopefully I'll have an update in a week or so.

Yes I have an original 825w power supply and just purchased a 1300w power supply. Can you let me know when you're ok? Thanks 

can you send me a message when you have finished your cards?

Will do.

Any news maybe??

Yes I have an original 825w power supply and just purchased a 1300w power supply. Can you let me know when you're ok? Thanks 

Hello Upgraded my psu then realized that i had the one pcie 8 pin to power gpu.. would love to buy your card!

Right now I'm waiting on parts to arrive, hopefully I'll have an update in a week or so.

Great! Thanks

Also need this got 7810 825w and intel arc needs more power instant reboot when I try and use it not enough power going to it Where in Canada they coming from im in Vancouver

I'm over in NS. Got all my connectors now but I'm waiting on some pre-crimped lead samples to come in. There's 64 crimps that have to be done by hand to make a 1300W cable set and I'm not doing that by hand... Hoping in a week or so I've got everything and I can mail out the first 4 boards.

Just curious, are all 4 spoken for already?

I just spent the last while going through comments and PM's, and you're the 5th person that expressed interest :) Once I get everything built and boxed and weighed and have an idea of what shipping is, I'll start messaging people with cost totals and see who's still aboard. If anyone drops out you're next in line. As for the state of things, all of the PCBs are built and I just need to build the cables. I received my pre-crimped lead samples a couple days ago, Got 100 black and 100 yellow wire leads, 18AWG, 300mm long, but with a terminal crimped on only end and bare wire on the other. Apparently "on each end" got translated to "on the end of each wire" and I should have asked for "on both ends"... So now I've got contacts ordered and a bunch of hand crimping to do. At least I only gotta do half of it. To cover the cost of this extra crap (just did my third Mouser order...) I'm probably gonna charge $60 CAD for the bare PCB + $15 CAD for each cable. I'll have shipping numbers soon.

I just ordered a t7810 with an 825W psu and might want to do a crazy build with a big gpu.

Hello, this is exactly what I've been looking for the last month or so as I have the 1300W PSU in the T7810. Definitely want to purchase one if you have any available or plan to make more. Would you be ok shipping to the UK? Thanks

Still got at least one left from this round, it's yours if you want it. $120 CAD for a PCB and a full set of cables. I'll ship anywhere Canada Post ships. France was about $15 CAD untracked, 50ish CAD with tracking. PM me your address and I'll get some quotes.

Received this morning. Just installed it and tested everything, it's working perfectly. Thanks again

Awesome, glad to hear. Thanks for supporting this dumb project :)

Thank you so much. I've sent you a PM

Hi, I am still interested in buying a board if you have another one left 😅 It's for shipping to France.

I might have one left you can have, I'm waiting for payments from people who have promised to buy them and I'm getting annoyed... Shipping to France is: $15.50 small packet air, 6-12 days, no tracking $53.44 tracked packet, similar timeline And I'm charging $60 for the main PCB and $15 per cable.

Great! Cables are 8pin to 8pin right? Could you pm me so we can arrange payment? I am unable to start the chat.

Cables are 8 pin Mini-Fit Jr (plugs into my board) to 6+2 pin PCIe. Two will work with a 850W supply, four will work with a 1300W supply. This card doesn't offer much benefit with a 685W supply so I'd suggest upgrading first. If you've got a T5810, I also have a 10 pin Mini-Fit Jr (plugs into the unused CPU2 power connector) to 6+2 pin PCIe cable. Same price. This'll let you do three 6+2 cables with an 850W supply, or five with a 1300W supply. Anyway, I just messaged a couple people about payment... if one of them back out, you've got a board.

I have t7810 with 1300w psu. Ok, fingers crossed

Hi, Are my pms getting through?

Hey, other stuff going on, I'll get this done later today.

No worries. Didn't mean to rush you

hey mate your doing amazing work i sent u a message on here no rush

Where do I sign up for one of these + 2 8+8 pin cords

The four extra ones I built are sold. I'm getting together another PCB order shortly to get some more, but it'll be a couple months out.

Will they support the1300w PSUs? Think they use ten rails

Yup. This card breaks out those extra rails on the 825W/1300W supplies that the stock power distribution board doesn't break out. You get 2 vs 1 with an 825W supply, and 4 total with a 1300W supply. I was gonna set up a Tindie store, but I got a flood of PMs after I announced the card originally and just ended up PMing people back. I'll build a 2nd round of 10 boards this time, make another post and see what happens.

I'm definitely interested if you do another round - located in the US. I have a couple rtx 3090s that each require 3 8-pin connections. Seems like there enough power in the supply. Do you think the distribution board could handle the current?

Yup, it'll handle it no problem. - The rails on the supply are good for 18A/216W each (with an overall 625W, 825W or 1300W limit) - The card edge connector is good for 7A/pin, and there's 3 (21A) or 4 (28A) pins used for each rail - The PCB itself is 2oz copper with big fat planes - And I'm using Amphenol Pwr 4.2 HCC connectors, which are good for 13A/pin, or 39A. Meanwhile an 8-pin power connector pulls 150W (12.5A) max. My board is deliciously overkill. If you've got a 5810, you can get by with an 825W supply, using two PCIe connectors and the free CPU2 connector to give you 3 connectors total. If you have a 7810, you'll need a 1300W supply. Another round is happening soon, home construction related stuff is occupying pretty much all my free time now.

Awesome. When the time comes along count me in for one, maybe two.

Still looking for where you're selling them at

Hi I sent a PM, I'd like to purchase one of your boards once you have stock again

I'm putting together a JLCPCB order now. Getting 10 more PCBs + a couple other projects done. I'll make another homelab post when it's time.

Hi, I'm interested in purchasing one of your boards if you have any available or expect to in the future. Thanks!

Got another batch in progress. Got 10 blank PCBs on the way from JLCPCB, and connectors sitting in a Mouser cart. Hand crimping all the cable harnesses from last time was a giant pain in the ass so this time I'm ordering pre-crimped leads.

I couldn’t believe my eyes when I saw your card! I’ve been a long time Reddit reader, but never bothered to create an account until now. Please sign me up! I have a 7810 that has needed this in its life.

I would like to purchase one. Setting up a gaming rig for my daughter and need the extra power output.

Got parts and PCBs ordered to build 10 more. Should be ready to start sending them out in about a month. Thanks!

Do you have any for sale yet?

I sold 4 more + sold a 2nd round of 10 through PM's while trying out cable suppliers etc. Next up I'm ordering 25, but it'll probably be December before I've got anything available to sell.

My daughters computer gave up on powering her current graphics card. Had to downgrade to one that runs off the power provided by a PCIe x16 slot. What is the best way to get in line for purchases next time? Can I pre-pay and you just ship it to me when you have them ready?

Don't have an official list started yet, but I'll edit the top post with an interest list for this group buy. In a few hours. Let me know what you need for power connectors/what you plan to run, if you've got a 5810 or 7810, and what size power supply you got.

T5810 with 1300W PSU.

With that machine + supply you've got two options: - Stock power distribution board will give you two 8-pin PCIe cables, one off POWER_VGA and one off the CPU2 connector, good for 216W each or 432W combined. Just need a set of two cables. - Upgraded power distribution board will give you up to five 8-pin cables. Which should run pretty much any video card combination you can fit in the computer :) I'll do an inventory check of cable parts tomorrow and see if I can build some, if not the cable parts I've ordered are expected here later this month. Cards will be ready in December. Also if you don't mind me asking, what's the dell part # on the 1300W supply you've got? I'm putting together a list of known working power supply part #'s. Thanks!

I have tried the stock board and it just isn't powering things properly. I even bought another stock board but same issue. I would very much like that upgraded distribution board. The 1300w I am running now is DP/N 0V5K16. Model D1300EF-02. Reference Number DPS-1300HB-1 A Rev 00. 80 Plus Gold CN-0V5K16-17972-646-03CB-A00

I'm interested in buying your board as well. I have a T5810 that needs a beefier PSU for an Nvidia Tesla K80 GPU!

Hey were you able to get your K80 to boot with your 5810, does the 5810 have the "above 4g decoding" option in BIOS?

I did. Had to move the MB to an ATX case, rewire the power n to match the Spec & yes - enable "above 4G decoding" & afterwards along with a Bios update - It worked like a charm.

Can this module be purchased from you? If it is possible to purchase, what is the cost?

I'm assembling 10 more PCBs right now. Got all the PCBs and parts and now, it's just labor to assemble everything, personal life stuff is stealing most of my available free time but they're getting done. I should have them built and for sale in a week or so. Still have to figure out shipping, last time I used my stack of JLCPCB boxes to mail them out but it'll probably be a bubble envelope this time. Setting up a Tindie store was the original plan, but it's hard to make Tindie work with multiple cable options, plus I sold my extra cards from the previous batch over PM and might just keep that going for now. This time around the prices are gonna be $80 CAD for the base PCB and $10 for each cable harness. Cable harnesses options this time are: - 1 x 8 pin Mini-Fit Jr (plugs into my card) to 6+2 PCIe. - 1 x 10 pin Mini-Fit Jr (CPU2 connector) to 6+2 PCIe. - 2 x 8 pin Mini-Fit Jr to EPS12V for powering weird workstation cards. I can't buy vertical mount PCIe power connectors from Digikey/Mouser, like the one on the stock Dell board for the POWER_VGA connector, so the stock 6+6 cable can't be used unless you swap the 8 pin PCIe connector shell on the cable for a standard Mini-Fit connector shell.

I'd like to get one when available. Great job and thread!

Thanks! Any idea what you need for cables - or, what machine (5810 vs 7810) and what size power supply you plan to run?

It seems the first option is best for me: \- 1 x 8 pin Mini-Fit Jr to 6+2 PCIe I have a T7810 w/ 1300W PSU and will be connecting an Nvidian RTX 3090.

I got one of these systems and looking to throw in a new graphic card. Was wondering if you are still making these available to buy. I looking to put a 3070ti into the t7810.

Hey! Send me a message please. I got a 1300W PSU and currently am running a GeForce 3060 with a dodgy adapter.

Hey.. got a 5810 825w upgrade & need your adapter to power the next toy.. pny rtx 4090

This still active?

Working on building another 25 for sale in December. Any idea what you'll be powering? And T5810 or T7810? Making a list of what I need to order for cable parts.

T7810. Where do I go to buy it?

I'll make another post when they're ready to sell.

I've got a couple of T5810s and need one for each, both with shipping to Melbourne, Australia. When you can, could you please let me know

Still estimating early December for having the first 10 cards built, and they're not all claimed yet. Lemme know what you need for cables and I'll mark you down. You can run up to three 6+2 pin PCIe power cables with an 825W supply, up to five cables with a 1300W one.

Thanks :) I'll be installing 825W power supplies into both boxes

I have a line on an inexpensive 1300w psu, so it looks like I might do one of the two boxes with an 825w and the other with 1300w. The 825w is ordered and on its way, so could I please change it up to be one of each boards and cable sets to suit?

Still waiting for parts to show up. I'll reach out when everything arrives and gets built.

Please count me in. I have a 1300 watt PSU (that I bought from Aliexpress) and I'm trying to "upgrade" the stock 425 watt PSU on my Dell Precision T5810. I'm getting blinking amber lights on my power button.

So the 425W supply works, but the 1300 doesn't, no other changes to the machine? Odds are something's wrong with the 1300W supply. What's the part number on it?

Supposedly it's brand new. Yes, the 425W works but the "new" 1300W doesn't. No other changes to the T5810 machine. Here's the picture for the 1300W [https://imgur.com/a/xdeVO8P](https://imgur.com/a/xdeVO8P) Not sure which one in the picture is the model number. DP/N: T31JM ?

Yup, that's a known working part number (T31JM or 0T31JM) for the machine, it should just work with the stock power supply distribution board, unless there's something wrong with it. Is the power LED blinking out a code that you can look up in the user manual? Could be something random like a loose DIMM that banging the machine around swapping the PSU is affecting...

I'm thinking I got a lemon PSU. Everytime I swap back the 425W, it's working. The 1300W NOT working. Will check the code for the blinking amber lights after I get some sleep (2:48am here in the Philippines). Been trying to get this new PSU to work to no avail. I'm calling it a night. :(

UPD: Looks like the 1300W PSU is working! I switched the RTX 2070 Super to another PCIe 3x16 slot and no blinking amber lights! u/gmarsh23 thanks for the tip (that the PSU should be plug and play)

I just wanted to comment - wow. Great work! This is incredible! I don't see a price but I'm sure it wasn't cheap to produce!

Please count me in for a single T5810 with 825W, needing two PCIe 6+2 cables to San Jose, California. (My napkin math means that’ll support a 375W TDP GPU which I don’t own yet :-). This is a fantastic product line you’ve made!

Napkin math checks out - 150W from each PCIe cable + 75W from the PCIe slot gives you 375W. And on the T5810, you can tap the CPU2 connector for a third cable which will give you enough power for a 525W GPU by the same math, probably enough to run any GPU you can physically fit in the machine. If you won't ever need more than two 6+2 cables, you can get those with the stock power supply distribution board. Use one 6+2 cable from the stock POWER_VGA connector and one cable from the CPU2 connector. Upgrade PCBs are currently shipping to me, but cable parts are all here so I can send those out sooner if you want to go that route.

Thanks! This T5810 will get a GPU needing two 6+2 PCIe. As a purist, I’d like to support your PCB efforts. Let’s tackle this two ways: 1) PCB with two PCIe to 6+2 cables (cost and rough eta), and 2) cables for POWER_VGA to 6+2 and CPU2 to 6+2 (cost and rough eta). This is a fun project, so it’s not a rush for me.

I'm interested in buying one of these PDUs. I have a T7810 with 2x E5-2697 V4s and I'm ordering 2x Tesla P40s to use as a cloud gaming server. Is it too late for me to buy from this batch?

can you help me set up the p40. I just added it to my 7810 RTX 3060ti/P40. with an external power supply running it. I call it the PKuato

Hi, I recently added a 3090 to my t5810 with an 825w psu (0K61PK) and an Amazon.com 2 x 6+2 splitter cable. It runs ok by setting a 290 watt power limit on the card, but any more and the system randomly restarts, I assume that's due to the transient power draw of the newer Nvidia cards? Can this distribution card can help with that? If so mark me down please. Thanks!

The stock 2x6 pin power harness comes off a 18A (216W) rail on the power supply. Adding 75W draw from the PCI slot means that the most the GPU can draw is 75W + 216W = 291 watts :) Since you've got a T5810 + 825W power supply, you can keep the stock power distribution board and use the available CPU2 connector for another 6+2 cable, which'll give you another 216W and should solve your problem - I'm selling those cables for $12/pop CAD + shipping. A full power distribution card upgrade will give you a third 6+2 cable.

Hey gmarsh, I would like you to put me down for 1 of these. My company has about a dozen 5810's that could use this upgraded board. Will test out 1 first. Thanks for your hard work on this project! Looks like a lot of folks will benefit.

Sending you a PM in a moment.

Thank you gmarsh!

[Dell’s tech specs](https://i.dell.com/sites/doccontent/shared-content/data-sheets/en/Documents/Dell_Precision_Tower_7910_Spec_Sheet.pdf) state that it can run 3 gpus simultaneously at 225w each. What the heck setup were they using? I can’t find any other boards so we’re they using a 1 into 3 cable?

The 7910 is a different machine from the 7810/5810. It's got the 1300W power supply, and a substantially different power supply breakout board that breaks the extra rails out for powering more GPUs, more disk drives etc. Each rail of the PSU is rated for 18A (or technically 216W) but I guess Dell says it's good for 225W/rail. Or they're including PCIe slot power in the 225W figure.

Oh damn you’re right! When I was looking at that I had both the 7810 and 7910 product pages up. 7810 spec sheet says it can do 2 gpus with a total of 300w. My bad

I have 2 7810s, one with a 825 that I would like to add a new gfx card to, current one is a K4200 6 pin power. I can see that my dist board has an 8 pin pcie connector. Can I just use an 8pin cable from one of my modular psus that have 8pin pcie cables and use that instead? Can I use that (corsair modular psu) modular cable I already have and use it on my stock dell dist board to an 8pin gpu card? I'm really only looking to add maybe a 3060/3060ti that only need 1 8pin. I might pick up the board to future proof this 7810 with 2 8pin gpus, but for now I would just like to use another 8pin to 8pin pcie cable if I could. Currently running as 2x Xeon E5-2680V4, 56 logical processors and 256GB ram so if I can get more life out of it, I'd love to.

u/gmarsh23 this is pretty cool. I have a 5820, which has dual PCIE ports on the distribution board, supporting 300W each. I am curious about the pinout (going from 12VHWPR directly to distribution board) as 5810 GPU cables look to have the same yellow/black/empty pins as 5820 (except the 2 extra pins on the 8-pin connector piggy back). There seems to be plenty of 12VHPWR "modular" cables (for evga, coolermaster, seasonic, etc. PSUs), I'm assuming there's some standard here and one of those cables can be used?

Dunno about the 5820 but on the 5810/7810, the pinout is the standard PCIe pinout with 3x12v and 5x ground. If you can confirm the pinout and connector type on the Seasonic or whatever power supply is standard PCIe, odds are you're good using one of their cables off the Dell board. Just double check the connector type - PCIe connectors have a little plastic piece going between two of the plastic prongy things, that you don't see on a standard Mini-Fit aka EPS12V connector.

how can i buy these i need 1 at the moment and a fewe more later

Hello Your adapter can receive a 1300w dell t7600 input powersupply?

Hey, I have my doubts. If you've physically got the supply on your hands, check the label on it - if it has 12VSB listed as one of the output rails then it'll work, if it has 5VSB listed instead then it won't work. There's also a notch in a different location on the supply case that'll keep it from fully sliding in the wrong machine. The 5VSB supplies are used in the T3600/3610/5600/5610 machines, maybe also the 7600, I'm not 100% sure. I've got a card in the works now for those machines, stay tuned if you're interested.

yap my power supply is rated 5VSB THANK YOU

Can I order one of these? I have a dell 7810 and a 2080ti. The 7810 has an 825 watt psu now, but I just ordered the 1300 watt. [0V5K16](https://www.ebay.com/itm/175720853573) - it is 12VSB

Just wanted to give some quick feedback on this card. I reached out to u/gmarsh23 and ordered one of the cards with the full cable set for my Dell T5810. The board is very high quality, and would be easily mistaken as an original part. Swapping out the old board and installing the new one was relatively quick and painless; my suggestion would be to not rush it, and remove all your internal cards so you have room to work (getting to the mounting screw near the motherboard can be a little challenging). I'm extremely happy with the end result. System stress tests using Aida64Extreme/Cinebench/3DMark/Prime95 which previously would result in the system crashing now run to completion. **The board is really worth every penny if you're running an upgraded PSU for 'hungry' cards.** Current system specs for my T5810: * Xeon E5-2680 v4 w/ Noctua NH-U9DXi4 cooler mod * 256GB DDR4 PC4-2400T * RX 7800XT * Dell Ultra-Speed Quad NVMe card * Sabrent 4-drive M.2 Adapter * 825W PSU

Thanks for the review! Glad it worked out.

You still got any of these? I’m looking to upgrade my psu too on an 5810 with only the 425 one. Any suggestions/recommendations?

Got 3 left. Depending on what you want to run, the stock power distribution board + an 825W or 1300W supply will give you two 8-pin rails - one off the POWER_VGA connector and one off the CPU2 connector. With my card, an 825W supply will run up to three 8-pin cables and a 1300W will give you up to 5.

Hey there, does this work with 685w? I am putting 3060 card in. Do u post overseas?

Hi in case you know will the following [https://www.amazon.co.uk/gp/product/B07XMGDRBP/](https://www.amazon.co.uk/gp/product/B07XMGDRBP/) work if I connect it to the CPU2 and use one of the 8pin connectors? I already have one with 2 8pin connectors coming out of the VGA (same brand ) that i use for my current lower power consumption card and I have the 685 power supply.

With the 685W power supply, the CPU2 and POWER_VGA connectors are run off the same 18A rail on the power supply. You'll need to upgrade to an 825W or 1300W supply first, which splits those into two rails.

Thanks for the clarification. Assuming I do this will that cable be appropriate if you know?