I was much delighted to finally receive my 8800 GTS from UPS today. Only to later be much disappointed when I installed it and got a horribly loud screeching/beeping noise. I've read online that it could be due to power problems, but I have an Antec Trio 680 watt PSU. Does anyone know what the problem could be? I had an Evga 7600GT in there before, and I didn't get the loud noise. I'm about ready to toss it out of a window and give up. Any replies will be greatly appreciated.