On a GA-6VXE7-4X mainboard i have a Dual Head Matrox G400 MAX but when I install the drivers (yes, the newest) windows doesn't shutdown, it only gives a black screen(not bleu) and the cursor. Sometimes it crashes on startup or on running, i've tried everything, also removing any devices except the vid-card and tried another vid-card, it worked. Does anyone has an idea?