Yeah to agree with the others, you bought an old POS.
Those processors are really terrible by today's standards.
They're quad core CPUs, with no hyper threading so it's only 4 cores, like an i5, and they have a pretty pathetic clock speed of 2.93ghz, they're also 130w TDP which is like was the high end overclocking CPUs run at.
These 4U rack mount servers are also LOUD AS $#%^!
They're meant to be locked behind doors where you can't hear them, because they sound like a vaccum cleaner 24/7.
Also, games/normal windows programs CAN NOT use more than 1 CPU, because they have to be specifically coded for it, and they aren't because no one uses multiple CPU systems for normal stuff.
If you wanted to experiment/learn how to run VMs are like Windows server 2003 R2 it may be useful, but only if you can lock it somewhere far away from anything with ears.