Since a couple of weeks I hav an AMD 3400+ on an MSI k8T-FISR2 mo. When the (yes it is old!) Nvidia TNT2 Mod 64 AGP4 card has a lot of work, the display starts to switch off (i.e. no SYNC for a second or so) it does this a couple of times and then after about half a hour the system (win-XP home) reboots. Windows reports a trhead-stuck in video driver error. I tried to reduce (bios setup) the voltage to the AGP-4 1.50 volt, but it only allows 1.55 volt as minimum...? When I don't do graphics intensive work the system is much stabler... Any suggestions? (I alrady trid another NVIDIA TNT2 64 card - same result)