Hello, I have a dell studio desktop 540 with intel q6600(G0 stepping 95w, no ocing) and only 1 HD. The system comes with a 6pin BESTEC 350W PSU(+12VA/12A, +12VB/18A). I was hoping if anyone can tell me what is the best possible video card i can have to run it safely at full load because I want to play Crysis. I was thinking about the new Radeon HD 5750 (max load 86w) or the Radeon HD 5770 (max load 108W). I would appreciate it if anyone can help me out. Thanks