Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Dual RX 480s in Mac Pro 5,1 running MacOS (w/ How-to)
- Thread starter theitsage
- Start date
- Sort by reaction score
Nope. But because they go out of their way to prevent things working. Nice assumption BTW.
Absolutely. I like a bit of utility though. I’ll buy their products if I don't get isolated from e rest of the world.
Me too. I’ve seen my 5770 to 470 go from 10505 to 87387 on GeekBench4 compute. As for the backplate mine is off too. That piece of plastic set into the aluminium keeps the contacts off the riser cover so that’s insulating enough to prevent problems.
I’ll boot into Windows later and have another look. Right. I’ve been to Windows and used GeekBench4 again. I got a score, (number 321957), that was about 30% higher.
Taken the 470 out for now though as the computer will not restart with it in, (well it does but I get no screen - I have too SSH in to shut down and change back to the 5770 before rebooting).
Last edited:
For me, even if I boot my 7950s from the non-EFI rom, 99% of the time I get the following screen. And only very very occasionally will get that error screen. Don't know why, but that's somehow intermittent for me, not always.
I am not 100% sure, but I don't think so. The following table should show all non-Apple kext on my Mac. The only unsigned GPU related kext is the HDMIAudio.
maybe i'm just stupid but i'm following the ITSage's Guide https://www.theitsage.com/install-radeon-rx-480-gpu-macos-sierra/. Im stuck on step 5 altering the AMD "R9 XXX" text to replace to RX 480. I find the AMD9500 controller file. I copy it to my desktop search for R9 xxx alter to "RX 480" save the file. (At this point once I save I cannot open this file again) I copy this file back to /System/Library/Extensions/AMD9500Controller.kext/contents/MacOS and over write the old file but every time I save the package always gets corrupted and doesn't update system about this mac. I then can't open the package again unless i grab my backup copy. I am using iHex to update. Can someone help? What am I missing?
It's been a while but I think you may need to run Kext Utility to repair permissions after the AMD9500Controller mod.
Thank you! I reran Kext utility and rebooted and it worked. Feels complete now!
Stupid question about KextUtility………..
When you open the app is asks for admin rights and then says, “Full service for "/System/Library/Extensions” and "/Library/Extensions" folders.”. I’m assuming this means that I don’t need to individually drag modified kernel extensions on it?
When you open the app is asks for admin rights and then says, “Full service for "/System/Library/Extensions” and "/Library/Extensions" folders.”. I’m assuming this means that I don’t need to individually drag modified kernel extensions on it?
Your assessment is correct. The app repairs permissions in those directories so you don't have to drag the modded kext files in it manually.
Thought so. Lovely, I’d seen lots of posts regarding the app and lots of people said to drag the kexts onto it after modding.
Thx.
The 30" requires dual link DVI. What card are you using exactly, and have you thought about trying one of these?
https://www.amazon.com/StarTech-com-DisplayPort-Active-Adapter-Converter/dp/B00A493CNY
As an Amazon Associate, MacRumors earns a commission from qualifying purchases made through links in this post.
XFX 480 GTR
It has a DL DVI, I also have an active DP to DL-DVI I've used for years. I've also got the Apple version and a DP to MDP
As an Amazon Associate, MacRumors earns a commission from qualifying purchases made through links in this post.
Thinking about getting the XFX Radeon RS RX480 8GB version. Are there any issues with this card? Someone mentioned that some versions of the RX480 does not work well on a 2012 cMP
<< EDIT >> found it somewhere else - Gigabyte and Sapphire are the brands to stick with
<< EDIT >> found it somewhere else - Gigabyte and Sapphire are the brands to stick with
Last edited:
Sapphire RX480 (11260-02-20G) Nitro+ OC 4GB GDDR5 has 2 DP, 2 HDMI and 1 DVI... will all these ports work on Mac too? Are 4K displays supported?
You'd have to try it and update us whether all ports work in 4K @ 60Mhz. The port layout on that GPU is not reference (3 DisplayPort and 1 HDMI).
Thanks for you answer
Does all ports works when using reference cards?
Did somebody tested references cards with one (or more than one) 4K display(s) too?
Last edited:
Thanks for you answer
Does all ports works when using reference cards?
Did somebody tested references cards with one (or more than one) 4K display(s) too?
I tried an LG 27" 4K display with a reference RX 480. The DisplayPort works in 4K @ 60MHz. The HDMI connection stuck at 4K 30MHz.