Two Xeon Processors And Games

I sometimes buy batches of used computers from companies to resell, and today someone called me and offered a deal.He was offering some servers using the 5000-series chipset (vague, I don't know the full specifics atm), that supports two processors.The processors installed atm are two Intel Xeon E5345.Now, I looked at benchmarks about them and they are around half of most of the top ten CPUs apiece.I doubt the score doubles if there are two processors of the same kind, but I really hope it does.Also, assuming it has a PCIe 16x (the 5000X chipsets do, don't know if this is X or not), will games run well on a rig like this if I slap a good card on it? Or the fact there are two different processors prevents games from using the second's processing power, or somesuch? (like it was for older games designed for single cores when running on dual cores)In the past all servers I found were too damn crappy to do anything else than what they were designed to do (sit in a server rack and do something boring 24/7), so I have little experience in re-purposing them.