I just built a new computer but used my old graphics card and hard drive...the system is an athlon 64 K8N-E 754 socket, 3000+ processor, 2 x 512 ballistic crucial memory, 120 Gig 7200 RPM hard drive, Geforce 4 Ti 4800 SE, 550 w truepower. When I'm running games, the graphics in the games tend...