XFX Radeon HD 6970 in Mac Po 1,1

[ozrob76]

Was wondering if anybody might be able to help, or give me some pointers on a new graphics card installation...

I have a Mac Pro 1,1 that is running Yosemite perfectly (except for the 7300 GPU issue). I realise I needed to upgrade the GPU, so bought an XFX Radeon HD 6970.
I read that these cards are natively supported in Yosemite, so didn't think there would be problems. I have checked the (AMD6000Controller & AMDx3000) kexts, and the card's ID is listed in them both.

I can get the system working from a Lion HDD, but whenever I try to boot from the Yosemite HDD, it kernel panics, and just goes into a loop doing that repeatedly?

I have the old 7300 card installed in the 3rd slot, so I can check the booting progress, and Pike's boot.efi works for about half the progress bar, and then reboots as above....

Any help/ideas/solutions would be appreciated

 

[666sheep]

So called "support" of 69xx series is buggy as hell and these cards basically do not work in OS X despite device IDs presence in kexts. You need something from 5xxx, 68xx or 7xxx series if it has to be and AMD GPU.

 

[Fl0r!an]

Damn it, was too slow.

+1 above post, get another GPU (preferably not 6xxx series as those cards won't give boot screen on an MacPro1,1).

 

[ozrob76]

Thx for the replies hey

Yeah it sounds like it will be less hassle to sell it and get a 7950, then...

 

[lowendlinux]

You could buy my 280 that's in the marketplace