Turning on antialiasing usually kills GPU performance. One GeForce GTX 580 can't really run Battlefield 3 at 1920x1080 with 8xAA at greater than 60fps stable, s

Turning on antialiasing usually kills GPU performance. One GeForce GTX 580 can't really run Battlefield 3 at 1920x1080 with 8xAA at greater than 60fps stable, so I'm not sure what you mean when you say games can't keep up. The games are keeping up quite well with the available hardware.