for what its worth, i just upgraded from a 8800gt and even the 8800 would play almost every game i have lol, and im an avid gamer. Even the "new" card is only a hd4850 and other then a couple new new games it can max the gfx. lol cant wait to upgrade, not gonna know what do with my self, might need 4 monitors and not 2 like i have currently :zfreie:

id say 2 cards max then with a 1350 depending on other power demands? hdd efficiency fans and how many. all add to the 12v side pull.

5 fans and one water cooler for the CPU.

wich unit? whats the wattage? 3 cards with 3 fans is A Lot of power. just make sure your not near peak output on the PSU. looks like a decent unit!