ok so im upgrading my old pc its a As Rock 785gxh/128 I'm going from 4 gigs of ram to 10 can go up to 16 im running windows 7 on a 64 bit system it has the AMD Athlon II X2 260 3.2 GHz and a gt640 GPU. My question is I can get these for about the same amount of money and I wanted to know what one was better. This one AMD Athlon II X4 645 3.1 GHz Quad-Core Processor CPU 95W AM3 . Or AMD Quad Core CPU Athlon II-X4 640 3.0GHz Socket AM3. They are with in 5 bucks of each other and I just wanted some insight and thanks.