I'm looking to upgrade my system since problems arose. I would like some advice on what CPU and Motherboard I should grab. It is a gateway 500S/E-3600, the system type is a X86-based pc, version 5.1.2600. Gateway Micro Tower. I'm trying to keep under $350. In another note my laptop is making a lot of noise I think it is the fan every so often it makes a really loud grinding noise what should I do about that?