I have been having a problem with my 4850 for a while now. When I play Crysis, Mass Effect or occasionally when I play Fallout3 or Oblivion I will get several types strange crashes unless I underclock the core to 600 for Fallout and Oblivion or 550 for Crysis and Mass Effect. The crashes vary sometimes I just get a black screen but the sound continues and I can shut down my pc with the keyboard but others I just get a black screen and the sound will stutter for a few seconds and it just Ether goes black or projects black or a color and a bunch of vertical lines that are usually green. At first i thought it might be the drivers. So I waited for 9.4 and it did happen a lot less but i would still get crashes in Crysis and Mass Effect but the 9.5 drivers made it a lot worse and lowered my frame rates so i went back to 9.4. I had also tried cooling and fortunately I had an accelero s1 from my last card so I got some zalman copper heatsinks and put them on but it still crashed even with all temps below 55c. I did find out that I can still overclock the memory without any instability. I have been looking this problem up constantly for the past few months and even though other people had the same problems none seems to have found a solution other than underclocking. Some of the people had replaced or sent the cards back to the manufacturer but they continued to have the problem. Though I someone suggested it was because of the motherboards only supporting pciex16 1.0 instead of 2.0 but unfortunately I don’t have the money to get a new motherboard to test that. It also happens in furmark but not in 3dmark vantage. My system specks are in my profile aside from the gpu clock which was before I had tried it in games. Would overvolting the card help?