Eng314
March 19, 2025, 4:22am
1
Hey! Hoping that someone has some ideas…
I went to switch to a newer Epyc 7642, but the system won’t post at all with the new CPU.
I’ve updated BMC, updated the bios (though it completes, it doesn’t show the new version in BMC).
I’ve reset the BIOS (cleared the CMOS).
Tried only one stick of ram in the C0, A0, and A1 slots…
CPU is not locked, no pins are damaged - it looks perfect.
On boot, the fans go full for a bit, slow down for a bit, then stay full until I force shutdown. I’ve waited a long time for it to post but nothing!
BMC still only shows the old CPU, I’m assuming that doesn’t update until it posts correctly.
Any ideas? I think I’ve tried everything I can think of! Any insight would be amazing…
check post codes and beep codes
How did you verify the CPU isn’t vendor locked? Read a few similar threads on here lately, where locked CPUs were the cause. Does the system still boot with the old CPU?
Eng314
March 19, 2025, 2:13pm
4
There aren’t any beep codes, it’s quiet when I turn it on.
I can’t find any post codes in BMC either… but that would be helpful! I’ll try to Google where those may be displayed if they show in there.
Eng314
March 19, 2025, 2:15pm
5
Huh, I trusted the seller?
I’ll be reinstalling the old CPU tonight or tomorrow again. Hopefully it boots up fine with the previous one still.
Post code should be on the dashboard (homepage) of BMC.
Eng314
March 20, 2025, 2:38pm
7
A POST code record would be perfect!
I guess mine was a newer version BMC.
Do you know if there a way to confirm/check this?
