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Mac Pro 3,1 With Radeon R9 390?

Status update:

Solved: I was able to fix permission issues for my edited kexts.

Unsolved: Fixing Signing Authority for edited kexts.

Unsolved: Disabling SIP from Mac Pro 1,1 with no recovery partition (but I am mounting my Mac Pro El Capitan partition on my MacBook Air with SIP disabled for now).

I will probably return the card tonight or early tomorrow but it would be nice to get it to work beforehand if only to share a successful process for readers.
 
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I think the following may fix the signing issue (thought the info below doesn't confirm this):

Type in Terminal:
sudo nvram boot-args=kext-dev-mode=1
Then restart

Hopefully someone can take it from here if this thread is still breathing. With my limited kext editing experience, I was ultimately unable to get my kexts to load for the Radeon R9 390. The card works great in Boot Camp. Regrettably, I will have to return this video card for a simpler, more reliable Mac OS solution. Thanks to everyone for your contributions.

My last attempt with kext loading produced the following details in System Info/Extensions:

AMD8000Controller:

Version: 1.38.3
Last Modified: 10/24/15, 2:28 PM
Bundle ID: com.apple.kext.AMD8000Controller
Loaded: No
Get Info String: AMD8000Controller 1.38.3 15905
Obtained from: Unknown
Kind: Intel
Architectures: x86_64
64-Bit (Intel): Yes
Location: /System/Library/Extensions/AMD8000Controller.kext
Kext Version: 1.3.8
Loadable: No
Signature Validation Errors: Kext signature validation error code -67030
Dependencies: Incomplete
Dependency Errors:
Dependency Resolution Failures:
Kexts already loaded for these libraries are not compatible with the requested version: com.apple.kext.AMDSupport
Signed by: Unknown


AMDRadeonX4000:

Version: 1.38.3
Last Modified: 10/24/15, 2:28 PM
Bundle ID: com.apple.AMDRadeonX4000
Loaded: No
Get Info String: AMDRadeonX4000 1.38.3 15905
Obtained from: Unknown
Kind: Intel
Architectures: x86_64
64-Bit (Intel): Yes
Location: /System/Library/Extensions/AMDRadeonX4000.kext
Kext Version: 1.3.8
Loadable: No
Signature Validation Errors: Kext signature validation error code -67030
Dependencies: Satisfied
Signed by: Unknown
 
kext-dev-mode doesn't exist anymore, you have to disable SIP to get an unsigned kext loaded. I don't know of any way to achieve that without recovery partition...
 
frstrtdmac said:
Interesting you stated this.. So on a Mac Pro 3,1 what card would be the best and not overkill then?
Click to expand...
it depends on resolution being used and the type of workload

MP3,1 is still good for 4K as it lets gpu to be 95-100% loaded.
 
netkas said:
it depends on resolution being used and the type of workload

MP3,1 is still good for 4K as it lets gpu to be 95-100% loaded.
Click to expand...

It's bottleneck at any resolution. I'd know as I tried a GTX 660 and GTX 960 4gb on a Mac Pro 3,1 both in OS X 10.10.4 and in Windows 7. Neither operating systems allowed the card to run at its full potential. Once I built myself a hackintosh is when the GTX 960 really started to fly and about twice the speed increase performance.
 
So for the price, what card would you recommend?

95% Adobe CS, Final Cut ( Maybe going to X ), the normal business stuff. Might got to 4k. I have cameras I would like to edit video in 4k then down stream to 1080P
 
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frstrtdmac said:
So for the price, what card would you recommend?

95% Adobe CS, Final Cut ( Maybe going to X ), the normal business stuff. Might got to 4k. I have cameras I would like to edit video in 4k then down stream to 1080P
Click to expand...

Well, definitely nothing better than a GTX 660, lol. I'd look into this:

https://www.techpowerup.com/reviews/Palit/GTX_750_Ti_KalmX/

It's passive cooled and anything better won't be much of a performance boost. The difference from the 660 to the 960 was about 5%. I did my tests using Unigene, Cinebench and Battlefield 4.
 
Certainly more than 5% possible:

viewer.php


viewer.php


netkas is right, the difference between GPUs increase with resolution. 4K doesn't increase CPU load, so a highend GPU will certainly be much better than that 660.

Btw, he doesn't talk about gaming but OpenCL/CUDA. This won't be bottlenecked as easy as a game.
 
Ok so... Im conflicted.. This is going to be a business machine, but it could also do gaming. Just not a ton of it. Maybe 10-15% gaming.

So shall I go with a 660 or higher? Also where do you find these already flashed? Im running 10.11.1 Sorry noob to the tech stuff.
 
I add a third vote to what Netkas & Florian have said. OpenGL hits a wall on 3,1 since CPU is needed so much.

CUDA and OpenCl can run on GPU and fly.

Not good for games, but still somewhat useful for real stuff.
 
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