This is killing me and my time. I have three Dell U2412 connected to a reference 7970. 1 monitor is connected to the DVI port. 2 monitors are connected to the mini DP ports with Mini DP to DP cables. For a while when the computer came out of sleep mode the DP connected monitors were reduced to 640x480 resolution. A reboot gets them back to normal 1920x1200 res. Now though they are stuck at 640x480, nothing I can do will change them. I have tried the latest drivers from AMD (12.2) and also a few of the unofficial drivers from these forums. Each time I uninstall the drivers, go to safe mode and run driver sweeper. The same problem was happening when I had DP cables and mini DP to DP adapters. Any one seen this before? I am starting to think the card might be stuffed.