I have just recently purchased a 7950GT and an SLI motherboard, and they are great. Now I have realized that I have enough money to buy another 7950GT and put it in SLI. The side of the box (BFG Tech) says I need a 500 watt power supply with 28A on the 12V rail to run SLI 7950GTs. My PSU is an Enermax 460 watt with 33A on the 12V rail. I don't really have much inside my computer, just: Overclocked CPU Mobo 2 DDR RAM sticks 1 HDD 2 DVD Drives Soundblaster Live! 5.1 a few fans Now, I am wondering if my PSU would be adequate for running 2 7950GTs or if I need to get a bigger PSU.