Very low cost config for 5 boxes

[Ughmahedhurtz]

Well, there's no guarantee but you might be able to find an old Core 2 Quad that supports your current LGA775 motherboard (just make sure it supports your FSB speed e.g. 1333MHz, etc.). That'll double the cores and might get you enough to run 5. I know people used to run 5 on a Q6600 back in the WoW 1.0 days but the engine has grown so much since then. If you're running them at like 800x600 or 1024x768 resolution and DX9 with basically all the graphics features turned off....maybe.

That's about the best I can think of without doing more or less a system upgrade. Good luck.