When I had 3 of them(tri-sli) I had 2 Evga's (1 sc and the other was a black ops edition) and 1 MSI twin frozr and it worked perfectly so really any other 1.5gb gtx 580 should work fine. Even a 3Gb one would work but only half the ram would be used. If you have a hard time finding one I still have the black ops card(with a gelid icy vision REV 2 cooler installed) sitting on a shelf collecting dust.