Why does Hyper-V see only one of the two sockets the Win 2012 host sees?

OS Name:                   Microsoft Windows Server 2012 R2 Standard
OS Version:                6.3.9600 N/A Build 9600
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Member Server
OS Build Type:             Multiprocessor Free
Registered Owner:          Windows User
Registered Organization:
Product ID:                00252-60271-31227-AA179
Original Install Date:     5/20/2015, 9:21:51 AM
System Boot Time:          5/20/2015, 11:35:02 AM
System Manufacturer:       HP
System Model:              ProLiant BL460c G6
System Type:               x64-based PC
Processor(s):              2 Processor(s) Installed.
                           [01]: Intel64 Family 6 Model 26 Stepping 5 GenuineInt
el ~2533 Mhz
                           [02]: Intel64 Family 6 Model 26 Stepping 5 GenuineInt

But the Hyper-V manager, in settings for  the vm, under NUMA config, shows only one socket. 

How do I fix this?

Any help/advice will be greatly appreciated.