So as far as a PSU I've done a few calculators and they range from 460w-750w. This may be a stupid question as I am out of the loop with PCs but what is the purpose of multiple 12v rails? I read a review about the XFX Black Edition P1-750B-CAG9 750W PSU it seems pretty solid. http://www.jonnyguru.com/modules.php?name=NDReviews&op=... I'm just not sure if its what I need for my build. I'm def open to any recommendations for PSUs. Any help is appreciated, thanks.-JC
The PSU you have selected is a very nice one. As beanoslim mentioned a good 550W would also do your job. But since you have already eyeing the 750W PSU, i would say you can go for it and be in peace with whatever GPU's you change in the future.
+1 to delluser1's observations. Another site that does excellent competent technical reviews is www.hardwaresecrets.com.
I don't know how much you want to spend, but the Seasonic "X" series are probably the best consumer PSUs out there now. They are overbuilt and can readily handle heavy loads. Check prices on the 560W and 650W models. To allow for all likely future possibilities, I'd suggest 650W (Seasonic, Antec, Corsair, Enermax or XFX are among the better brands); 550W-560W in any of these would probably do just fine, but for what's likely a very meager price difference, a 650W model may make more sense, especially when you consider it may have a few additional cables.
^What did that mean? No one in his right mind would suggest a "cheap" PSU; the ones that have been discussed are actually capable of putting out well over their labeled rating. I'd prefer not to believe you were suggesting he go for a chokemax brand like Apevia or Raidmax.
Of course, if you were suggesting trying to get something like a HD6850 instead, that's fine; a second one may not be needed in this build, ever. In that case, a less expensive but still quality 500W PSU like an Antec Earthwatts would be sufficient, or a 650W Truepower New would be less expensive than the Seasonics, but handle a second card also. Being [semi-]modular, you wouldn't have a mess of extra cables like you would with some of the Corsairs. If budget allows though, the Seasonic X-650 is still probably the best choice.