Showing results for 
Search instead for 
Did you mean: 

Crosshair X670E Extreme stuck on memory test

Level 9

After running this machine for almost a year, this issue popped up out of nowhere, not after any kind of update, and I can't figure out how to fix it. Doing a CMOS reset allows it to boot up once or maybe twice, and then the issue pops up again, requiring another CMOS reset and the process repeats. This even happens with the RAM at default JEDEC settings. My current workaround has been to enable Memory Context Restore setting to bypass the memory test, but if it somehow decides to do another memory test it is likely I will have to do yet another CMOS reset. I also reseated my RAM and swapped the sticks into opposite slots. I also updated my BIOS to 2007 which didn't fix the issue. Here are my specs:

CPU: AMD Ryzen 9 7950X | Motherboard: Asus ROG Crosshair X670E Extreme | RAM: G.Skill Trident Z5 Neo RGB 64GB (2x32GB) DDR5-6000 CL30-40-40-96 1.40V F5-6000J3040G32GX2-TZ5NR | GPU: Nvidia Geforce RTX 4090 Founder's Edition | PSU: Be Quiet! Dark Power Pro 12 1200W | Storage: Western Digital Black SN850X PCIe 4.0 M.2 SSD 4TB x3 | Sabrent Rocket NVME 4.0 2TB | WD Ultrastar 20TB HDD x4 | Case: Lian Li O11D XL | Audio Cards: Marian Clara E Dante PCIe Card | Pro Tools HD Native PCIe Card 


Super Moderator

Hi @polyh3dron 
After performing the clear CMOS are you enabling EXPO overclocking?

When the system refuses to POST, what Q-CODE is displayed?

Memory Context Restore function retains the last known successful memory training parameters. The setting won't suddenly "decide" to perform them again, however, if the memory stability is conditional, POST may not complete successfully as some tests are still conducted to ensure stability.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Hi @Silent_Scone I have replicated this issue without enabling EXPO as well. Just plain JEDEC settings as explained above. While Windows is running, the computer can pass a Karhu RAM test, but once it goes back to memory testing after a restart, it will get stuck until CMOS is reset yet again. When it's stuck, it shows Q-Code 15.

Q-CODE 15 is a training code. It can take up to 1 to 2 minutes depending on the memory configuration.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

It was stuck on that code for 24 hours.

Level 9

Attn @Silent_Scone this time it gave me an od code.


And now after resetting CMOS again and having one successful startup, again with just auto RAM settings, I’m stuck in the memory test with a C5 code.


I’d consider reseating the CPU and cooler.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Level 9

Will be giving that a shot soon, thanks. Got a whole watercooling loop to drain and clean.

No worries. That's why I have quick disconnects 😁.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Level 9

Do you have cpu vddio on auto?

If its on auto lower it to 1.25v .

At least on my mobo it only randomly post with auto setting and with you issue its seems like same.