Well, I have a Asus P8H61M-LX2 motherboard, a Intel Core i3 2120, a Asus Geforce GT640 2gb, 6gb RAM and a 430W power supply. I am not going to buy the 660 because Im not just a casual gamer, I play games like Battlefield 4 and Crysis 3 so I started to upgrade my PC. Does the Radeon R9 270X need a better power supply?