hey guys, I've been looking at this card and wowwee, looking at one of the review, a customer's described how FarCry 2 went from 10 FPS to 200-250 FPS. I've checked the slot, and my Dell Optiplex 380 have 1x PCIe x16 slot and this would fit it right? Also, I have a 255W power supply, is that enough?