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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: 1745139" data-attributes="member: 388218"><p>I use an external PSU to power a GTX 7780 ti card in my 2008 Mac Pro (Dual 3.2). For some reason the power supply will not turn on when it's plugged into the GPU. Unplugged the PSU fan will spin. Plugged in it doesn't. And I think with this PSU the fan always comes on. I've tried using both 8-pin cables from the CPU and just one from the CPU and one using the power supply from the board (two six-pins to one 8-pin adapter). The GPU worked in a another machine. Other GPU's work in that slot.</p><p></p><p>Why would plugging this card in make the PSU shut down?</p></blockquote><p></p>
[QUOTE="Deke29, post: 1745139, member: 388218"] I use an external PSU to power a GTX 7780 ti card in my 2008 Mac Pro (Dual 3.2). For some reason the power supply will not turn on when it's plugged into the GPU. Unplugged the PSU fan will spin. Plugged in it doesn't. And I think with this PSU the fan always comes on. I've tried using both 8-pin cables from the CPU and just one from the CPU and one using the power supply from the board (two six-pins to one 8-pin adapter). The GPU worked in a another machine. Other GPU's work in that slot. Why would plugging this card in make the PSU shut down? [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
Mac Pro 2008 with External PSU Problem?
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