Hello. I just had a motherboard crash on me; the sata/raid portion went out. I thought this would be a nice opportunity to make the change from vistax64 to windows 7 x64. I have a Sapphire Radeon 4870 512 MB that ran flawlessly on windows vista x64. When I first loaded windows 7 it auto installed my graphics cards drivers. After about 20 minutes of running great, the screen turned white and had lines all over it and rebooted. I was doing an office install at the time, nothing too graphic intensive. Upon this happening twice I went into errors and recovery and disabled the option to auto reboot on error. The next time this happened it blue screened so I was able to see the error. It said it was a display driver error and pointed to this as the culprit- "atikmdag.sys". Upon reboot I went into device manager and uninstalled my graphics card. Then I went to ati’s website and downloaded the latest driver for windows 7. About 20 minutes of working it did the same thing. I thought since this wasn't an "ATI" card, per say, but a Sapphire card I would try their drivers. I uninstalled the ati utility and uninstalled the graphics card again. This time I installed the Sapphire drivers for this model for windows 7 (64 bit). Still nothing. After reading many other forums with this issue I can see that updating the bios on the card won’t work either, although I plan on trying it myself. Has anyone had an issue with this card in windows 7? I'm thinking I might just go back to vista if this is going to be too much trouble because the main use of this pc is for gaming. Please let me know any other suggestions. I also found this to be useful and will be taking the steps posted on this first post in this forum:http://forums.amd.com/game/messageview.cfm?catid=260&threadid=100973. However in this forum, windows 7 was never mentioned, and I believe that has something to do with my issue. Thank you.