Have no idea which one yet. But yesterday, as spywaredr knows, I reinstalled Windows 7 on my brother's Dell computer. Everything went fine and I got all drivers installed with help of Dell support. The problem now is, Dell's BIOS isn't recognizing his standalone Nvidia card. Neither is Device Manager inside Windows.
My next option is to open computer and remove card, reinsert it and boot up to see if BIOS detects card again. Does anyone know how to get this Dell to do a P.O.S.T?

I can take a photo of the BIOS and attach it here if you think that will help, let me know.