I bought an msi 6600gt agp and am having problems with it. It works fine for 2d things in windows, but the second i try to do something 3d or even open up dxdiag or the nvidia properties under display properties the screen will go black and I have to reset the machine. I was using a very cheap 400w allied power supply that was only rated for 12a on the 12v rail. I replaced it with an antec smartpower 350 that says it is 21a on the 12v rail but I am having the same problem. Is this a power problem or do I need to rma the card?