Help me upgrade my old Alienware Area 51

HowToEatBurgers

Honorable
Aug 10, 2013
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10,690
So I bought a second hand Alienware from my local computer store (£150) the guy who owned the store said if I ever wanted to upgrade he would install it for free for me. My current specs are: Intel Core 2 Quad core cpu 2.40Ghz 8GB Ram Windows 7 64bit NVIDIA GeForce GTX 295 (x2)

This is an image of my CPU and Mobo specs, my case is an ATX case so any motherboard will do. Please keep it within £350, the gpu can be ignored for now just the CPU, Mobo and ram.
(My psu is 700w)
http://imgur.com/a/OpyPw