[b1lk1]

Those calculators are worthless. I have run dual card setups for a long time and never needed more than 500W. A Quad core SLI 8800GTX dual waterlood with plenty of accessories will need 800W tops. I don't know if most people realize that you cannot pull 1000W of power out of a normal household wall socket when the PSU is fully loaded down. Unless you have a completely dedicated wall socket with say a 25A breaker, you will guaranteedly trip the breaker or pop the fuse. Power supply companies have perpetuated the myths we need more and the consumers are sucking it up like drones. Get a Kill-A-Watt meter and see what your PC actually pulls out of the wall socket. You will be amazed when it is probably half what you think it is.

My PC is OC'd and SLI'd which are OC'd. I run 2 drives in RAID 0 and I have a spare HD for data. 2 DVD drives, 8 fans, some lighting. My PSU eats it up and spits it out. I would feel 100% comfortable running SLI'd 8800GTS's AND a Quad core.