Recently my Asus Ti-4200 64meg has started to randomly in windows flicker once or twice, then all the sudden the screen freezes and the system reboots, I first thought it was my card, then i thought it could be the cheap psu, so i unhooked a few drives and everything was fine, so i replaced the case and psu with an Antec Alienware type case and a ThermalTake 420watt psu, and the problem is coming back, any suggestions, please!!!!!