No graphics acceleration of AMD Radeon HD 7000 (R7 250X) on Mojave

[naquaada]

Hello,

 

I'm still using old versions of OS X because they're working. My main system is Mavericks 10.9.5.

My graphics card is a Sapphire GPRO 4200. It's a single-slot, low profile graphics card with

4 GB VRAM and 4 Mini-DisplayPort connectors. I also have the GPRO 6200 with has 6 ports.

The chip is Verde, ID is 0x682B which is listed OOB in 7000/X4000.kext.

 

I've now made a Mavericks installation from scratch, it's working perfectly.

I've also a nearly finished Mojave installation on HFS+, everything is working.

The card is detected as Radeon 8830M 4 GB, OpenGL works, but is very slow.

The GUI is even slower. I have that issue since Yosemite and my Radeon HD6870,

so I stayed with Mavericks all the time.

 

I've now tested all framebuffers with 6 DisplayPort outputs:

OPM, IkuraS, Junsai, KaniS, MaguroS. No success, Mojave is still slow.

If I choose Inject ATI in Clover graphics settings I'm getting the red X64 Exceptions error.

Mainboard: Gigabyte GA-Z77M-D3H, Core i7 3770S.

 

Has anyone an idea?

 

Greets, naquaada.

 

 

Edited 8 hours ago by naquaada