EXPO is not working on x870-i

[Barabulka327]

Hi everyone,

I have x870-I motherboard, with 9950x, with RAM KLEVV CRAS V RGB DDR5 48GB (2x24GB) 8200MHz CL38 A-DIE 1.45V SK Hynix Chip. This ram is in the qvl list. 

I installed beta 823 bios as recommended by this forum, but no matter what I try, expo 1, 2, twilked, on the fly+, windows cannot boot and always gives me blue screen with error 0xc0000221.

I assume nothing can be done right now and I should just wait until asus fixes it with new bios update? 

This MB have only two M2 slots and I use them both. Using only gen4 slots is not an option. 

[Silent_Scone]

Hi @Barabulka327 

Tough frequency. Have you tried lowering to 8000MT / 7800MT?

However, 1:1:1 is still best for performance.

[Barabulka327]

Everything except "auto" gives the same result unfortunately.

[Barabulka327]

I managed to make it work at 7800 without errors. On 8000 windows loads but tests show errors, while 8200 cannot even boot system. I assume to make it work above 7800 you require very precise tinkering and full understanding what you do. Plus I assume it is a lottery still, depending on how good of a cpu/mb/ram you actually got. Right?

[Barabulka327]

By any chance can I learn what was recommended settings for memory I have for that motherboard so it end up in QVL as 8200?

[Silent_Scone]

8000-8200MT really depends on the CPU. Maximum validation is always going to come down to some luck.

Try tuning VSOC and VDDIO. However, best performance is found at 1:1:1 ratio. Try aiming for 6000-6400MT with uclk=memclk 1:1 

[Barabulka327]

I am not as expirienced with overclocking, learning for the past year.
I see.  Main factor/handicaper here is the CPU. Silicon lottery is real.

But if i have 7800 MHz stable with EXPO 1 with that specific RAM. Do i need to go lower to 6000-6400? What's the poing in 8000+ freq then?

[Silent_Scone]

Because some time ago, AMD allowed the DRAM and CPU to run asynchronously. It depends on the workload whether or not it's worthwhile. Research is always key!
Look online at some benchmarks depending on what you want the system for. For gaming, running 1:1 is normally preferable.

[Barabulka327]

I assumed that for work tasks, virtual labs and gaming with high end GPUs high feq is better than keeping 1:1:1 especialy with non 3d v-cache cpus.

How can i learn if my CPU is good enough or even capable of 8000/8200 or should i stay with 7800? I understand that the higher you go Diminishing Returns makes performance growth less and less.