My motherboard is a socket 939 - sadly. This is Gateway's information on it: support.gateway.com/s/MOTHERBD/FIC/105553/105553sp26.shtml Now, it says it'll run an Athlon 64 X2 4200+ ~4800+. The problem is that those are hard to find. I have found a lot of 3800+ and for a better price (of course). Will the motherboard still run those processors? I've thought about buying a new system completely, but I don't have the money to. I can either buy a new CPU or wait a couple more months and then upgrade everything.