Hello, My son has an asus M4N68T-M mother board and wants to upgrade to a Quad core cpu for gaming. He has a 450 watt power supply and 4 gb ram, nvidia geforce gts 4500 video card and amdII x2 250 cpu. It's a 64 bit system and I'm going to increase ram to 8 gb. What cpu would you suggest.
AMD Phenom II x4 965, you can also overclock the CPU.