![]() Follow the Apple Technician Guide for "No Video" ()įor the tech guide, go here and scroll down to the bottom, you’ll see the PDF: Mac Pro 2009-2012 Repair ![]() Mark, I figured one of the greybeards would have cranked out an answer by now, but I'll throw in a few suggestions: The voltages on the aux ports is fine, but I have no way to test with a calibrated load to see if indeed the PSU is putting out the power it is supposed to.Īny thoughts? Am I doing something wrong or forget to do something? I almost think it is a PSU issue that maybe it is not putting out the power needed. I tried the RX 580 again in the other x16 slot. So I put my stock GT 120 card back in and everything is fine. So I then purchased the RX 580 (nice blue card)! When I installed the card I get nothing. Thinking it may be a bad card I returned for a replacement and am waiting on that. When I tried the Vega, it booted fine, BUT NO VIDEO. ![]() I have tried the Vega 56 and now the Sapphire Nitro RX 580. I have a 2009 Mac Pro -> 5,1 and upgrade CPUs running OS X 10.13.6.
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