Hello!
I have Intel Server R2308GZ4GC. I've installed Windows server 2012 R2 Standard with Hyper-V role. Recently I've installed 2nd Intel Xeon E5-2630. But host windows still detects 1 CPU/6 cores/12 logical processors only.
I tried to remove Hyper-V role - windows detected 2 cpu/12 cores/24 logical processors. After I installed Hyper-V role windows began to detect 1 CPU again.
I couldn't find out answer why is this happening?