Hey guy's. Basically I own a Dell Optiplex 390 Small Forn Factor machine, and are currently using the Intergrated Intel HD graphics. I want to upgrade, I see this nice card thats cheap. A ASUS Radeon 6570 and am thinking of buying it. here's the problem, ny machine has a poor PSU, 240W to be exact, and I dont know how much Power the card will need, but I'm gathering it'll be a little more than that, haha. Since my machines a small form factor, I'm limited in PSU's, I basically need help finding a PSU that will work with my PC. Thankyou.