first I must sayYOU CANNOT USE A FULL SIZED GFX CARD IN THIS, EVEN WITH THE COVER OFF. IT ABSOLUTELY MUST BE LOW PROFILE AND POWERED THROUGH PCI-E, NO 6 PIN POWER!I got  this intending to use it stock as a dualbox pc in a midrange  MMO game. It ran well enough for what I needed it for on low res low settings, but eventually I got tired of looking at the same game in such poor detail and framerate on my second display. So I doubled my investment and got a LP 1650gtx and  2 more  4gig memory sticks(no heatsinks) then fired it up and now its running the game almost as well as my main system I spent nearly  2 grand building just a few years ago. It went from animated GIF to 60-80 fps. Total cost $320.This thing only has a 240w proprietary power supply. The card I got listed 300w min. I'm sure it was an overrating, but I went ahead and disconnected power to the disc drive to cut some fat off. Its been running without a problem for months now.I would avoid any AMD cards, nothing against them, but their cards tend to be more power hungry than nvidia.