I had a system that had a Abit AN8 Ultra, Athlon 64 3800+X2, 2GB memory, GeForce 7800GT, 150GB WD Raptor (10,000RPM, SATA), DVD reader, burner, Antec Sonata 2 case (450W power supply). I decided to jump to a Core 2 Duo processor. I decided I didn't need to do any overclocking, so I went with an...