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MP 1,1-5,1 Best RX 580 card for 3,1 and 5,1

flat4 said:
hmm

I dont so much probably why i haven't had issues.

I was under the impression that each mini 6 pin on the board put out 75W but you're saying that it only does 75W for both?
Click to expand...

Mini-PCIe 6-pin is rated to 75W, each. PCIe 8-pin is rated to 150W. You need both mini-PCIe 6-pin to power a 8-pin.

If you don't want to make a Pixla's mod, maybe eVGA PowerLink will be sufficient for balancing the power draw when in non flat-out usage.
 
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Hi tsialex. Jessie’s Flying recommended I seek help from you on my situation with my metal gpu card (Radeon rx580 8gb) not working properly on my Mac Pro 5,1 after updating (clean install) to Sonoma through opencore. My gpu reads 7mb instead of 8gbs and when I enter my password to get in my cpu, the screen flips upside down then turns white. If I select a background, I get serious lag. Also, my other monitor won’t work anymore. I did the root patches on the metal gpu and my Mac Pro won’t finish the startup. The bar gets to almost full and stays there. I tried reverting the root patches first and experienced the same thing. This my first time using this site, so I apologize for the long story. I need help and your name popped up.
 
Bookaboy said:
Hi tsialex. Jessie’s Flying recommended I seek help from you on my situation with my metal gpu card (Radeon rx580 8gb) not working properly on my Mac Pro 5,1 after updating (clean install) to Sonoma through opencore. My gpu reads 7mb instead of 8gbs and when I enter my password to get in my cpu, the screen flips upside down then turns white. If I select a background, I get serious lag. Also, my other monitor won’t work anymore. I did the root patches on the metal gpu and my Mac Pro won’t finish the startup. The bar gets to almost full and stays there. I tried reverting the root patches first and experienced the same thing. This my first time using this site, so I apologize for the long story. I need help and your name popped up.
Click to expand...

Be sure that your GPU works with a clean install of Mojave WITHOUT OpenCore/OCLP. After you are absolutely sure that your GPU works correctly in every way, you can try anything else.

Debugging a GPU with unsupported macOS releases is a completely waste of time, too much moving parts that you have zero control as an end user - you can't know if the issue is the GPU firmware, OCLP root patching incorrectly done, OCLP patched driver that does not work with your GPU, Sonoma GPU personality or even a hardware defect.
 
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Thanks for the response. My gpu worked great with Mojave through opencore. I made the mistake of installing the new root patches after the install and everything went downhill after that. I’m currently using the original gpu that came with it but I can’t use certain programs I use that calls for the metal gpu. At least I have my original Mac hd with high sierra on it. That’s my fail safe when I mess up like this.
 
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