Insanely slow POST with new Crosshair X670E Hero and 7950X

[zeblote]

Hi, I just built a new PC with these components
- Crosshair X670E Hero
- Ryzen 7950X
- 64GB G.SKILL ram (clocked at 5600Mhz/CL30 after some experimentation which was REALLY painful with this slow POST)
- 4x Samsung 980 Pro 2TB SSDs
- TUF OC 3090 with 3 monitors attached
- 2 sets of mouse+kb, one wired one wireless

It takes an insanely long time for anything to appear on the monitors after pressing the power button, we're talking like up to a minute every time. This should take below 5 seconds.

The mobo spends quite a while doing seemingly nothing while the code 15 ("pre memory system agent initialization is started 1/4" according to the manual) is displayed. Does this indicate an error? I tried updating to the latest bios available, but no change.

Does the bios write some kind of log somewhere so one could figure out what it's having trouble with?

[zeblote]

I should mention that removing the memory overclock and resetting the bios to all default settings didn't change anything about this slow POST.

[zeblote]

Okay, after more experimentation it seems that the memory actually was the issue. However it only becomes faster on the _second_ reboot onwards. Very strange.
It's still not as fast as my other PCs are, but a lot better.

I'll need to try with another set of ram, since this one appears to not be on the QVL, which helpfully only became available after I had already bought all the stuff.

[Murph_9000]

Slow/long POST is normal on X670 after a memory configuration change. Either a physical change, first boot after clear CMOS, or after memory-related BIOS config. The BIOS trains/retrains the memory timing, and it just takes a long time on X670. It should learn the memory timings, then give fast/normal POST times on subsequent simple boots. This isn't a new thing, but takes much longer on X670 than previous platforms.

[zeblote]

That is very good to know, thanks!

[zeblote]

After installing the latest BIOS update today, I am now able to run the memory listed in the OP at full 6000Mhz using the new "DOCP 2" profile. Pretty nice.

[TroyDota]

My setup is the same except i have 128gb of ram and i wait about 5min before the boot gives me BIOS.
Any idea how to reduce this time, its actually so unbearable i am considering refunding the board.

[WHO_FARTED?]

My setup is the same except i have 128gb of ram and i wait about 5min before the boot gives me BIOS.
Any idea how to reduce this time, its actually so unbearable i am considering refunding the board.

every boot? should just been the first.

[TroyDota]

No mine just wasnt booting it would run get stuck and then not boot. And if it booted bios and i rebooted then it would take another 5-10min to boot bios again.

I fixed it tho updating bios solved some of the issues. I also have the G.SKILL Trident Z5 RGB Series 64GB 6000Mhz memory kit (2 of them so 4 sticks x 32GB)

Cant seem to get the XMP profile to work, i can see both profiles in the BIOS but selecting one and then rebooting causes a safe boot and reverts the OC.
Any ideas?

[WHO_FARTED?]

No mine just wasnt booting it would run get stuck and then not boot. And if it booted bios and i rebooted then it would take another 5-10min to boot bios again.

I fixed it tho updating bios solved some of the issues. I also have the G.SKILL Trident Z5 RGB Series 64GB 6000Mhz memory kit (2 of them so 4 sticks x 32GB)

Cant seem to get the XMP profile to work, i can see both profiles in the BIOS but selecting one and then rebooting causes a safe boot and reverts the OC.
Any ideas?

Is it hanging when at stock speed too or just when try to enable xmp?