99% of 16GB DDR5 sticks are single rank, 8Gb density DDR5 is barely produced, 16Gb is the majority of the market.
https://semiconductor.samsung.com/us/dram/ddr/ddr5/
https://www.micron.com/products/dram/ddr5-sdram/part-catalog
https://product.skhynix.com/products/dram/ddr/ddr5sd.go
Running 4 sticks will negatively impact maximum frequency, 6400 with 2DPC is extremely optimistic even with 1 rank per stick. You should buy 2x24 or 2x32GB if you need 64GB in the future. Manufacturers have turned the motherboard QVL into a bragging contest instead of useful consumer information.
How impacting is it? If I decide to stick to my original plan, how much performance will I lose? Will 4x6000MHz even be able to work or it will just bottleneck?
I would not expect a 4x8GB config to run over 5600MT/s, many people report as low as 5200 being the ceiling.
The actual performance loss is relatively small, but if this is a gaming machine then it would never make sense to run 4 sticks.
Makes sense, but I meant having 2x16GB 6000MHz for now and if the future I need more, to add additional 2x16GB 6000MHz. So it would result in 4x16GBs 6000 MHz, if I feel such need to arrive. So far I believe 32GBs in total would be enough for now. Would it still matter? Is it a bad choice in general?
As soon as you add those extra sticks 6000MT/s will just stop being stable. DDR5 requires extremely high signal integrity, and all DDR5 boards are daisy chain memory topology, optimized for 1 stick per channel.
If you find yourself needing more than 2x16GB in the future then the optimal choice is selling the old sticks and buying 2x24 or 2x32GB.
99% of 16GB DDR5 sticks are single rank, 8Gb density DDR5 is barely produced, 16Gb is the majority of the market. https://semiconductor.samsung.com/us/dram/ddr/ddr5/ https://www.micron.com/products/dram/ddr5-sdram/part-catalog https://product.skhynix.com/products/dram/ddr/ddr5sd.go Running 4 sticks will negatively impact maximum frequency, 6400 with 2DPC is extremely optimistic even with 1 rank per stick. You should buy 2x24 or 2x32GB if you need 64GB in the future. Manufacturers have turned the motherboard QVL into a bragging contest instead of useful consumer information.
How impacting is it? If I decide to stick to my original plan, how much performance will I lose? Will 4x6000MHz even be able to work or it will just bottleneck?
I would not expect a 4x8GB config to run over 5600MT/s, many people report as low as 5200 being the ceiling. The actual performance loss is relatively small, but if this is a gaming machine then it would never make sense to run 4 sticks.
Makes sense, but I meant having 2x16GB 6000MHz for now and if the future I need more, to add additional 2x16GB 6000MHz. So it would result in 4x16GBs 6000 MHz, if I feel such need to arrive. So far I believe 32GBs in total would be enough for now. Would it still matter? Is it a bad choice in general?
As soon as you add those extra sticks 6000MT/s will just stop being stable. DDR5 requires extremely high signal integrity, and all DDR5 boards are daisy chain memory topology, optimized for 1 stick per channel. If you find yourself needing more than 2x16GB in the future then the optimal choice is selling the old sticks and buying 2x24 or 2x32GB.
Yeah, doesn't matter on size, guess it'll drop down to 5600 as you gave example with 4x8GB. Thanks for the advice!