Thanks for the input. I checked a few sites to figure out which outputs come from which rails -- I've got my PCIe modular cord plugged into the far left port, and all the other three cords plugged into the far right -- giving the GPU "its own" rail.
Any particular reasons/causes for the...
Just built a new C2D system:
Conroe 6300
MSI 975x platinum power up mobo
MSI Radeon X1900XT
Antec NeoHE 500W PSU
2GB Corsair DDR 667 RAM
The computer boots and is stable in the Windows desktop. 3Dmark runs OK, memtest runs OK.
When playing games, a distinct high-pitched whine...