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gtx 660ti
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MP 1,1-5,1 Mac Pro 2009 4,1 (flashed to 5,1) Gtx 660ti not showing display but shows up in system profiler as a gpu.
My Mac Pro 4,1 (flashed to a 5,1) that I just purchased yesterday has a Radeon HD 4870 was glitching so I grabbed my old gtx 660ti and plopped it into the bottom slot and booted it and no post so then I put both cards in and the Radeon had 4870 had a display but not the 660ti when I plugged in a...