I have a 4 x 10 core (80 threads) machine. I've installed windows server datacenter 2012 and now i'm only able to use 2 cpu. Windows server datacenter 2012 only allows 2 cpu per license key. I do have 2 license key but i got no idea where to input the 2nd key. I'm only using 1 license right now. When i use cinebench, the cpu usage stays at 50% in the task manager. I've been searching everywhere for an answer. Can anyone help me?