Unable to boot EXPO on Rog Strix X670e-e

[MMORA43]

Hello

I still have these problems

Motherboard: Asus Rog Strix X670e-e

BIOS version: 2506 - AMD AGESA ComboAm5PI 1.2.0.2a

Processor: Ryzen 9 7950X

RAM: DDR5-6000 2x32gb Corsair Vengeance CMK64GX5M2B6000Z40

I can't get the EXPO I / EXPO II / EXPO TWEAKED profile to work, I have tried absolutely everything and the PC does not start above 5200 MHz.

Any solution?

[Nate152]

Thank you for the screenshots.

Very strange indeed that you can boot with a 600MHz overclock. If it's stable, I'd keep 6600MHz as your voltages are fine.

Always double what CPU-Z shows for the Dram Frequency. It's showing 3300MHz, double that and you're at 6600MHz.

Looks quite good actually.

Zen Timings also shows 6600 MT/s. MT (Mega Transfers) is the new term for DDR5 and equals the same as MHz.

[MMORA43]

It´s not stable. Testing now with 5400, looks stable atm, going to test 5600 and 5800 if it´s possible

[MMORA43]

5600 also stable 

[Nate152]

Looking good so far !

[MMORA43]

Unable to boot above 5800

So finally im on 5600 and MLCK=UCLK, FLCK=2100, PBO -10 and PPT 170

Looks stable atm, good CPU temps and about 1900 score at CineBench2024 multicore

Probably testting tomorrow lower DDR5 timmings (primary, secondary...)

Thanks a lot for your help!

[Nate152]

You're welcome.

Thank you for the screenshots once again.

I see the Command Rate is set to 1T, this is keeping you from hitting 6000MHz.

In the bios, go to Dram Timing Control. At the very top are the four primary timings and the Command Rate.

Set the Command Rate to 2N or 2T (whichever your memory kit gives), then try 6000MHz.

[MMORA43]

I just don´t know how to change Command Rate "Cmd2T" on the BIOS settings

[Silent_Scone]

CR1 can be left for now. Depending on the memory config and BIOS rev, Gear Down may be disabled.

ADDR_CMD_Mode in DRAM Timing Control > Unbuffered [to enable]

Check the status in Zen Timings. 

Retest stability.

[MMORA43]

Like this?

Test passed at 5800, looks stable but some icons appears in white on Windows

Icons issue

[Silent_Scone]

You need to enable GDM by going to ADDR_CMD_Mode in DRAM Timing Control. Set to Unbuffered. This may help stability.