Forum seems to be pretty dead, but I'll give it a try.
Was playing setting in different GPUs into server without any problems and one day it happened...
Server loops in reboots after like 5 seconds. BIOS jumper allows single start, but screen remains black, i.e nothing seems to work. After this single "start" server again loops in reboots.
iRMC says "processor detected->OK->green", but no CPU model, no speed, no cores/threads.
RAM module state says "configuration unknown" for all slots - both populated and empty. I have 2 types of CPUs and memory - all shows same behaviour and all were working fine before.
iRMC component status says all components are green.
Tried to empty up all PCI slots, resetting BIOS jumper, changing CPU and memory.
Will appreciate any help.