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Ah okay, I see.
So you can't boot into Windows 10 without having the 5770 in there? Is that right?
[doublepost=1482564787][/doublepost]I may be late to this conversation, but I am currently trying to figure this out for my self. I bought the card recently and I have tried it to no success. I have the XFX RX 480. I'm thinking that in order for BootCamp Win 10 64bit to recognize it, the Mac OS side has to recognize it first. So my question is....has anyone figured out how to get it to work in Sierra OSX yet. The XFX version of the card.
 
XFX is known to have issues, nearly no 270X worked in a cMP. I have a Sapphire RX 480 and 470 here which i'll add shortly to this 5,1 - a single slot 460 comes in next week (HIS makes these, but only 3 display outputs instead of reference 4).

Without a boot screen enabled card (not RX 480, eg. 5770 or a flashed GT 640, 280X...) you cannot (easily? for filevault you might be able to tab around and enter PW, i try later today when i switch to a 470)) boot Windows.
 
[doublepost=1482564787][/doublepost]I may be late to this conversation, but I am currently trying to figure this out for my self. I bought the card recently and I have tried it to no success. I have the XFX RX 480. I'm thinking that in order for BootCamp Win 10 64bit to recognize it, the Mac OS side has to recognize it first. So my question is....has anyone figured out how to get it to work in Sierra OSX yet. The XFX version of the card.
for the record I have the XFX RX 480 reference card and it works fine in bootcamp with the drivers that came with the disc for windows (Then do the AMD update). OS Sierra works fine once you enable the acceleration using the k text edit. This is the card I bought. I removed the under bottom backplate like everyone else said due to since there is a plastic piece on top of the metal in the mac pro when you remove the original mac HD55770 or whatever: http://www.newegg.com/Product/Product.aspx?Item=N82E16814150770&cm_re=rx480-_-14-150-770-_-Product

Long discussion is on this thread for how to make it work:https://forums.macrumors.com/threads/dual-rx-480s-in-mac-pro-5-1-running-macos-w-how-to.1984213/

Theitsage put together an in-depth guide which i used and it works https://www.theitsage.com/install-radeon-rx-480-gpu-macos-sierra/.

On step 5 rerun kext utility again and reboot to complete. I just found this out.

EDIT: Running in 5,1 Mac Pro Mid 2010. Os Sierra 10.12.2
 
XFX is known to have issues, nearly no 270X worked in a cMP. I have a Sapphire RX 480 and 470 here which i'll add shortly to this 5,1 - a single slot 460 comes in next week (HIS makes these, but only 3 display outputs instead of reference 4).

Without a boot screen enabled card (not RX 480, eg. 5770 or a flashed GT 640, 280X...) you cannot (easily? for filevault you might be able to tab around and enter PW, i try later today when i switch to a 470)) boot Windows.
Be interested to know if you have any issues with the 470.
 
RX 480 is not fully supported but it seems that Polaris 10XT2 had been added in MacOS for iMac series(I assume) so let us wait for it. Not sure if Polaris 10XT2 is compatible with Polaris 10 like RX 480 and 470.
[doublepost=1482673699][/doublepost]
XFX is known to have issues, nearly no 270X worked in a cMP. I have a Sapphire RX 480 and 470 here which i'll add shortly to this 5,1 - a single slot 460 comes in next week (HIS makes these, but only 3 display outputs instead of reference 4).

Without a boot screen enabled card (not RX 480, eg. 5770 or a flashed GT 640, 280X...) you cannot (easily? for filevault you might be able to tab around and enter PW, i try later today when i switch to a 470)) boot Windows.

I dont have any issues with XFX RX 480.
[doublepost=1482673795][/doublepost]
for the record I have the XFX RX 480 reference card and it works fine in bootcamp with the drivers that came with the disc for windows (Then do the AMD update). OS Sierra works fine once you enable the acceleration using the k text edit. This is the card I bought. I removed the under bottom backplate like everyone else said due to since there is a plastic piece on top of the metal in the mac pro when you remove the original mac HD55770 or whatever: http://www.newegg.com/Product/Product.aspx?Item=N82E16814150770&cm_re=rx480-_-14-150-770-_-Product

Long discussion is on this thread for how to make it work:https://forums.macrumors.com/threads/dual-rx-480s-in-mac-pro-5-1-running-macos-w-how-to.1984213/

Theitsage put together an in-depth guide which i used and it works https://www.theitsage.com/install-radeon-rx-480-gpu-macos-sierra/.

On step 5 rerun kext utility again and reboot to complete. I just found this out.

EDIT: Running in 5,1 Mac Pro Mid 2010. Os Sierra 10.12.2

What do you mean removing a metal plate?
 
RX 480 is not fully supported but it seems that Polaris 10XT2 had been added in MacOS for iMac series(I assume) so let us wait for it. Not sure if Polaris 10XT2 is compatible with Polaris 10 like RX 480 and 470.
[doublepost=1482673699][/doublepost]

I dont have any issues with XFX RX 480.
[doublepost=1482673795][/doublepost]

What do you mean removing a metal plate?
The backplate of the graphics card (RX480) so the interior is exposed. If you don't it will be very tight so the recommendation from everyone I read was to just take it off so it fits in the pci slot
 
Worked fine to boot, draws weird on login just like my 480 but fixed with the PCI ID change also.



The XFX RX480 should be near reference, the 270X cards were heavily customised.
You mean the plist mods for the 4100 kext?
 
My XFX RX 480 works fine in bootcamp. I get the full acceleration with the card and everything. I am also able to utilize the Open CL function for Video Editing and Rendering. Its a little slow still with Davinci Resolve for windows... But you can work with it in Proxy mode to speed it back up. However, Its on the mac side i struggle with it. It displays the picture just fine, but its a little slow when generating graphic motion on some application when opening and closing or moving screens such as the Application Launch Folder. l Do music, photo editing and Wed Design in the Mac OSX. But I see no benefit with using this card because the Open CL Technology is not recognized by mac yet. Other than that, it displays a nice crisp picture via DVI and HDMI. It does not support Display Port yet. I am planning to look for a driver to instal to see if that helps.

Based on my finings. I may just make my Bootcamp primary Video and Photo processing and Web design, Music for the MAC OSX.

I hope this post will help and add to the community. If anyone has figured out how to Flash the card with the Mac EFI for the boot screen or Get the Open CL technology to be recognized in GPU intensive applications. Please let me know.
 
The backplate of the graphics card (RX480) so the interior is exposed. If you don't it will be very tight so the recommendation from everyone I read was to just take it off so it fits in the pci slot

It perfectly fit into Mac Pro so I have no reason to remove it or it will be a problem.

XFC RX 480 is still not possible for bootcamp. I guess we should wait for Polaris 10XT2 if that allow us to use RX 480 with full acceleration.
 
It perfectly fit into Mac Pro so I have no reason to remove it or it will be a problem.

XFC RX 480 is still not possible for bootcamp. I guess we should wait for Polaris 10XT2 if that allow us to use RX 480 with full acceleration.
10.12.4b1 is out. Who knows it may be included in that……..
 
Sapphire Nitro+ RX 480 is not recognized by window 10 bootcamp. I got into bootcamp with GT120 alongside the 480, but crimson drivers, amd minimal setup, and even Sapphire's install driver DVD that comes with the box don't see it. "We are unable to find a driver for your system. No supported AMD hardware are detected". How did you guys make it work?
 
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Success! RX480 is now working with no glitch in BootCamp. Crimson drivers don't see RX 480 as compatible card in bootcamp until kext edit is completed in Sierra. Then download and install BootCamp Graphic Drivers from AMD using Mac EFI or flashed card (GT 120 perhaps) first.
 
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Hi folks, I've been having troubles getting my RX480 to run in bootcamp (win7 64Bit). So far I have Sierra 10.12.3 running smoothly with a reference HSI RX 480 in slot 1 and the standard 5770 in slot 2.

I had to take out the RX480 in order to install windows since I got a black screen whenever it was installed. I was able to boot into windows with both cards installed as long as only the 5770 was connected to my Display.

When I tried to install the AMD driver the RX480 wasn't recognised so I tried to manually install the driver without the AMD installer. During installation windows crashed (bluescreen) and now the boot camp drive seems to be corrupted...if I try to boot into windows I get stuck at the boot drive selection screen.

I'm already fearing that I'll have to freshly install windows again...does anyone have any advice on how to get the RX480 running next time? Any help is greatly appreciated.
 
The bluescreen issue is usually due to driver conflict. If you could boot into the window in safe mode and are familiar with Device Manager, check which drivers are loaded within Display Adapter. The minimum required driver (i.e. Microsoft Basic Display Adapter) or 5770 drivers should be there working properly but if not it could easily turn into quite an involved hassle. Hence reinstalling window may be more favorable option. Getting RX 480 working in bootcamp nevertheless entails lots of restarts and demands certain steps to follow.
  • First, make sure kext-edit with RX480 is completed in Sierra.
  • Then install window 7 with bootscreen-capable GPU ONLY (in your case 5770) in the system.
  • Once you get to the desktop, you have to install initial window updates (i.e. letting the window itself automatically install essential updates) and Boot Camp compatible with your Mac before the first shut-down from installation. At this point, the Display Adapter should be loaded with 5770 driver included in the Boot Camp package. After restart, installing latest window update may help but is optional (tedious!).
  • When the window is all in working order, shutdown and plug in both 5770 and RX 480. At this point, only 5770's ports are functional to display window.
  • Then download and install AMD Boot Camp Software Graphics Drivers for Win 7 which will take care of the rest and VOILA! 5770 and RX480 drivers seamlessly work together on Window 10 in Mac Pros.
The above is the proven general guideline for installation of RX480 in Window 8/8.1/10. Let me know if it applies to you as well.
 
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Thanks for the pointers! But that's pretty much (step-by-step) the same thing I tried the first time. Everything did go as you described up until the last step. I downloaded the official driver from AMD but for some reason whenever I tried to install the driver, it wouldn't recognize the RX480 as an officially supported AMD GPU and installation would fail.

Fortunately, after removing the RX480, I was able to use a restore point to fix my boot camp drive which saved me hours or reinstalling. After doing some research I found this guy who provides AMD drivers modified for bootcamp. I don't know if it's the same driver that you hyperlinked in your last step, since your link seems to be broken. Using this modified driver I was able to install the RX480 without any problems. Right now I only have the RX480 installed, but I will test if Windows accepts both GPUs and report back.

Did you use the same driver as I did?
 
Nope. I have fixed my previous post's hyperlink which will direct you to AMD's official Boot Camp graphic software (AMD BC software) drivers download page, which is specifically created for Boot Camp by AMD. You can also navigate thru to it under Mac Graphics via Manually Select Your Driver.

In window 10, the installed drivers version, downloaded automatically by the AMD BC software, is NOT ReLive 17.3 but Crimsom 16.2 which is so far working flawlessly in cMP.
 
Ok, it was somewhat confusing to me since I visited that page before but specifically didn't download the driver since it says on the page that it's catalyst and not crimson. But if you're saying that it's the correct driver then I'll run DDU and try to install again from official AMD page.
 
Should be possible since STek ZeNIO got it running on a 2012 Mac Pro. Essentially the same machine as your 2010 model.
 
I had a similar problem where I was installing bootcamp on a Mac Pro 4,1->5,1 with a RX480. I kept getting a black screen when installing Windows 10 from a DVD. I resented the PRAM and that resolved those issues and I could complete the installation.
 
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