MP 1,1-5,1 Radeon R7 250 in 5,1?

[rm5]

I have a spare Dell OEM Radeon R7 250 GPU (2 GB version) that I bought from a local shop a couple of years ago, and just realized I still have it.

I have a 5,1 Mac Pro running Monterey through OpenCore. Currently, it has the stock 5770 video card, and I attempted to put in the R7 250. The machine booted up fine, but when it got to the login window, I noticed there was no GPU acceleration. In "About This Mac" it does not detect the card, and instead says "Display 6 MB."

I also noticed it did not show the "original" gray screen before booting into OpenCore, so I think that means that the only reason this card even displays video on this Mac Pro is because it's running OpenCore, but I could be wrong.

My question is: Is there a way to make this GPU work in this cMP and also achieve full GPU acceleration? On the Definitive Mac Pro Upgrade Guide, it lists the card as being Metal-supported. It also says that it "requires a hack" to get it to work, but I already have OpenCore. It would be great to use so that I don't have to go out and get another Metal-supported video card.

Any thoughts?

 

[Borowski]

This is typical behaviour when no matching driver is present in OSX.
If possible, you can attach the bios of this card. Perhaps it has no GOP-support, which is necessary for startup-screen with OC.
To my knowledge, this is a very special card, only available from OEMs and has the "Oland"-gpu, which is a late branch of AMDs GCN1.0-architecture.
I guess you can't fix the problem completely, possibly some hackintosh-guys could mod something (this is the needed hack), but better look for a better matching card.

 

[rm5]

Thanks so much for the information! I think I'm better off, like you said, buying a fully supported Metal GPU.

 

[Nguyen Duc Hieu]

Thanks so much for the information! I think I'm better off, like you said, buying a fully supported Metal GPU.

Monterey has already support the new AMD RX 6600XT, hasn't it?
Otherwise, a cheap RX560 works, too.

 

[rm5]

Monterey has already support the new AMD RX 6600XT, hasn't it?
Otherwise, a cheap RX560 works, too.

I was looking at the WX3100, but it looks like the RX560 is roughly the same price ($150). And yes, you're right, Monterey does support the RX 6600 XT.