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Apple Computing Products:
macOS - Desktop Hardware
Mac Pro 2008 with External PSU Problem?
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<blockquote data-quote="Deke29" data-source="post: 1745166" data-attributes="member: 388218"><p>I had been running two 680 cards in the same mac, with updated drivers, and extra juice from the same external PSU. I thought a 780 would take their place fine. I just don't know why a PSU would shut down when connected to the card. Is the 500w PSU not enough for that card? Not sure what you mean by plugging in the cables. I did try a different 750w PSU and that seemed to help...the mac started up without the GPU's fan going berserk, but it never got past the gray screen to actually boot up.</p></blockquote><p></p>
[QUOTE="Deke29, post: 1745166, member: 388218"] I had been running two 680 cards in the same mac, with updated drivers, and extra juice from the same external PSU. I thought a 780 would take their place fine. I just don't know why a PSU would shut down when connected to the card. Is the 500w PSU not enough for that card? Not sure what you mean by plugging in the cables. I did try a different 750w PSU and that seemed to help...the mac started up without the GPU's fan going berserk, but it never got past the gray screen to actually boot up. [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
Mac Pro 2008 with External PSU Problem?
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