MP 1,1-5,1 GPU Compatibility List for cMP

[LookToWindward]

For anyone interested, I've flashed the original BIOS of the card and now I have the OCLP boot screen menu. Till then, creating the OCLP with amd gop inject worked fine as well. But these ebay ads are misleading, be careful.

Did you need a PC to flash?

 

[Mac Hammer Fan]

I bought the same card from the same seller and have issues trying to enable GOP as it seeems that the BIOS from the card has been modified. I can't seee the OCLP menu. The sellers marks it as unmodified GPU but seems otherwise. Did you manage to enable GOP to get the Boot menu?

I didn't try to enable the GOP for a boot menu. Otherwise the card works well.

 

[AritzUrr]

Did you need a PC to flash?

I used a windows installed in the same Mac pro. It worked well and it allowed me to use GPU-Z to get info on my exact model to find the proper original BIOS file but apparently you can do it using linux.

 

[AritzUrr]

I didn't try to enable the GOP for a boot menu. Otherwise the card works well.

What macOS are you using? I get some graphic issues on Ventura.

 

[LookToWindward]

I used a windows installed in the same Mac pro. It worked well and it allowed me to use GPU-Z to get info on my exact model to find the proper original BIOS file but apparently you can do it using linux.

Thanks, I was a bit worried to do this, since if the Flashing fails in any way, you won't be able to fix it without using a PC? Is this a real concern or am being too cautious?

 

[Mac Hammer Fan]

What macOS are you using? I get some graphic issues on Ventura.

I use Monterey.
There are graphic issues in Ventura and Sonoma with every card because my Mac Pro 5,1 doesn't support AVX/AVX2.

 

[AritzUrr]

Thanks, I was a bit worried to do this, since if the Flashing fails in any way, you won't be able to fix it without using a PC? Is this a real concern or am being too cautious?

Definitely not an expert but for what I gathered it is a delicate process. Make sure that you are using the correct BIOS version for your card and when you do the flashing make sure that nothing will interfere in the process.

I used this as a guide (it's in spanish):

 

[AritzUrr]

I use Monterey.
There are graphic issues in Ventura and Sonoma with every card because my Mac Pro 5,1 doesn't support AVX/AVX2.

So, no solution when using Ventura/Sonoma? Monterey does not support the version of Logic that I use.

 

[LookToWindward]

Definitely not an expert but for what I gathered it is a delicate process. Make sure that you are using the correct BIOS version for your card and when you do the flashing make sure that nothing will interfere in the process.

I used this as a guide (it's in spanish):

Yes, that's why I've shied away from doing it on doing it on a Mac. Ideally a PC with a built in GPU and a PCI GPU that you flash, then if it goes wrong you can least recover from it

 

[flyproductions]

Thanks, I was a bit worried to do this, since if the Flashing fails in any way, you won't be able to fix it without using a PC? Is this a real concern or am being too cautious?

Might be "a bit too cautioues". 😉

As far as it's for one of the Sapphire RX 580/590 Pulse/Nitro+, most of these cards are "Dual Bios". So you can leave the card's own (known working) BIOS at switch position 1 (or left), boot the card with this one to Windows. Then, when booted, switch to the other position and flash the BIOS you want to test to this with AMDVBFlash.

The BIOS flashed is allways the one, the switch is set to. And switching to the other position with the up and running machine does not do any harm. So if anything goes wrong and the flashing fails or ROM does not work, switch back to the working one and start from scratch.