I have a Lenovo ThinkCentre M57 6072, 3GB ram, Core 2 Duo E6550 and it has a intel GMA 3100 integrated graphics chip\card(?). The psu is 280 watts. The case is a small form factor, so the card needs to be half the height, and i need a card that can replace my GMA 3100 and still be under the 280 watts. I just want to play GTA 4, i checked my computer on the 'canyourunit' website and everything passes except the graphics card. Are there any good cards? Thank you.