I currently have an xps 8000 with stock 350w psu, 8b ddr3, core i7 860 with a GT 220 which is causing black out and other problems. Some on the Dell forums say to return the computer. Others say just upgrade the gpu as that is the only problem with an otherwose good system. I want to get the best card I can without upgrading the psu. I saw the gt 240 512 with ddr5 and the gt 240 1gb both for $99.99. Which is the better? My Gt 220 is 1gb. THanks for your help. Any suggestions on other cards I can run on that psu are appreciated.