I have a 1GB 460 stable, no artifacts with core @1000MHz but Im using Precision to OC, not Afterburner. Sits @61c while stressed...gaming @ 40-50c depending on the game (I'm not a huge gamer). You gotta love cards that run cool. I did have to up my voltage by about .025 to stable the OC. I'll get more out of it though, don't worry.