What is with the absurd recommendation for high wattage PSU? I run a 430W with SSD,1 TB Velociraptor, i5 3570k, Radeon 7850, DVD drive, 8 GB DDR3, and H60 water cooling kit along with 3 case fans. It's been working for 6 months with no problems. If my PSU was that stressed, it would've burned out already. My temps are always good playing any game. FYI 77W for CPU, SSD only use about 5W at load, Velociraptor 1 TB consumes 4-7W max, Graphics card is about 100W max for 7850. His 660 GTX is just a little more. Everything else like RAM, DVD drive, motherboard shouldn't burn more than 60W unless he's running 8 fans. At worst, I estimate his system going a little over 300W if he likes LEDs and lots of fans. So even a 500W system running at only 80+ bronze efficiency will suffice. You are all just going nuts with the spec chart. If you plan to run SLI then yes go for 750W to be safe. But I honestly don't think you'll even need that unless you SLI and overclock. The 660gtx and i5 3570k is pretty power efficient at stock speed.