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gt 740

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    Mac Pro 4,1 GPU update

    Hi all, I read that you can buy a PC GPU and install it into an older Mac Pro. I have an early 2009 Mac Pro and purchased the EVGA GT 740 and it's not working. I can hear/ see the fan on the card working, but I did not connect the 6 pin cord into it. Do I need to do that? (It didn't come with...