Question 256GB DDR5 ?

[braxus]

It's been close to a year since their December 2023 announcement, but any idea when we'll see 64GB DDR5 sticks with 4 of them making 256GB memory? I know of the server stuff, but I'm talking for home PCs. I just got a new X870E board which supports 256GB, but the memory is nowhere to be seen. I do 8k video editing if you are wondering.

 

[Endre]

It's been close to a year since their December 2023 announcement, but any idea when we'll see 64GB DDR5 sticks with 4 of them making 256GB memory? I know of the server stuff, but I'm talking for home PCs. I just got a new X870E board which supports 256GB, but the memory is nowhere to be seen. I do 8k video editing if you are wondering.

Hello!

DDR5 does support 4 DIMM configurations, however it does that at lower speeds.
AMD guarantees only 3600MT/s in 4 DIMM configurations.

Even when using dual-rank 2x32GB sticks, it's challenging for the IMC to run at those EXPO advertised speeds!

For instance, I am using a Kingston Fury Beast KF564C32BBEK2-64 (2x32GB DDR5, QVL) paired with an ASRock X670E Taichi motherboard.
The memory kit has 2 EXPO profiles:
EXPO-6400 CL32-38-38 &
EXPO-6000 CL30-36-36.
But, the IMC of my Ryzen 9 9950X can't handle those speeds reliably (I get errors in MemTest86).
So, I am using the EXPO-6000 profile with the DRAM lowered at 5800 (no errors in any memory testing program).

CONCLUSION:
For stability reasons, please stick with 2 DIMM configurations.

I hope this helps...

 

[braxus]

I don't mind underclocking the ram if I have to. But be known I have been running 4 sticks of 32gb sticks for 2 years now with little issues, and I wasnt underclocking those either. I need 256gb for 8k video editing, which eats up memory fast.