I am seeing a very strange issue on a couple of blades which show one of the missing CPUs out of two CPUs. During boot time BIOS showed two CPUs detected but when i went to BIOS [F9] i saw one CPUs missing. I did upgrade firmware etc. but it didn't help even with the same firmware version running on other blades and they are showing two CPUs.
Boot time detected 2 CPUs
In BIOS setting only showing single CPU.
EDIT
Here is the side by site comparison of memory module layout between good and bad blade (we have 4x16GB module so each cpu has 2x16G)
