I just reinstalled windows vista on my computer. I have a crossfire enabled ASUS EAH3870X2 supporting my two Dell 3007WFP monitors. Previously, it allowed me to run both monitors at 2560x1600. Now that I've got everything set up again, it will only let one set to that resolution. The other is sticking at 1280x800 max. Both the monitors and the graphics card have the most recent drivers from their manufacturers' websites. What am I doing wrong here?
More aboutmulti monitor resolution issue
Try removing the old graphics driver via the device manager and then doing a restart. Perhaps the wrong drivers were installed by Windows.