The GT 120s are killing me in a WinXP program that I use. I tried sticking in a GeForce 8800GT that I took from a windows machine. When you power on, a loud alarm goes off. Obviously, I turned it off. I was under the impression that I could use a diff't card. I know most pci's won't boot os x, but I thought I could use it just for Win. This alarm going off tells me otherwise. Weren't 8800 GT's available for Mac pros recently? Any ideas/tips? Thanks much!!