Within secs-mins the computer freezes and is unresponsive but does not crash (also happens in safe mode). The screen seems to dither and sometimes there is tiny color specs. Rebooting the computer will boot back up no problem and seem absolutely fine till you try to do something then within secs to mins it freezes. Memtest says the memory is fine, Hitachi fitness test says HD is fine, the Bios reports the PSU voltage is fine, Speedfan reports the temperatures are staying cool, there are no add in cards, no conflicts in device manager, nothing in the event viewer, all drivers/system is up to date, monitor tested on another computer and works perfectly.
Let me know if I missed something and thank you for the help.