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MP All Models AMD Radeon RX 6800 XT / 6900 XT for macOS?
- Thread starter Xenobius
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You will have to dump the bios in a PC and then see if you can get it modded, and then reflash it in a PC after.
The code from @Syncretic cannot find what to patch on this video card. I have tried it already. But it works fine in a PC. If @Syncretic is willing to look at the code he might be able to fix the patch for this vbios.
Would sure be worth an ask if possible, I wonder if it would work in a 2019 Mac pro, Has any one fitted one in a 2019 pro to see?
I have the original Apple EFI: Radeon HD 5770 1024 MB, which is a double slot card, it can work off slot-2, that's how I use it with the non-Apple EFI Nvidia reference Titan-X (Maxwell) if I need to trouble shoot.
I will try it along side and check.
I have a clean install of Monterey patched with Martin Lo's latest OC build on an SSD which I connect as and when I need. However, the cMP did not even give to the initial boot chimes, so that made me wonder if it was able to POST.
Well it does work in a 2019 mac pro for sure. the gigabyte 6900xt card in the uk now £749.00
The 6800xt is even cheaper at £649.00
Pro W6800 versus RX 6000 series in Mac Pro 2019
real world speed test results for performance minded Macintosh users
barefeats.com
The 6800xt is even cheaper at £649.00
No-go with the the original Apple EFI: Radeon HD 5770 1024 MB in slot-2 while the W6800 was in slot-1. Did not even get to the boot chimes. The front power button LED stays on and nothing happens. So I guess no POST. Back to square one. A used WX9100 never worked, now a brand new W6800 is in a similar situation.
Your only hope is that the rom file can be modded to work. And you do like the W series cards for sure, Just a shame they wont post in the Mac pro 5.1 you should have got a 6800xt model, its faster for a start and it will boot after rom update like has been shown in this thread.
I was quite divided between getting a reference AMD RX6800 or the W6800. Cannot use anything more than a 2-slot GPU as I have 2 RAID HBA's (HighPoint 4522 and ATTO R680) on slot-2 & 3, and a Sonnet USB-3 controller card on slot-4. All of which serve data I/O and storage needs. Hence the inclination towards the W-series.
The RX6800 was exactly half the price of the W6800 on eBay for a new one. Eventually bought the W6800 seeing the hopeful comment from startergo (since I do not have access to a PC to flash the RX6800 if the need be. One of the reasons I went for a WX9100 in the first place was that it has native support from High-Sierra and no patch is needed).
Oh well. Back to the drawing board.
Luckily prices are much more affordable now, so the pinch is significantly lesser on the pocket.
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Unfortunately GFX cards these days come with huge coolers to keep them cool, 2.5 slot cards very common now. The MP 5.1 by its nature was never designed for modern day cards and when your useing most, if not all the Pcie slots you GFX choice is limited. The main reason i use a VII in my 5.1 its not over massive.
I would not say so. W6800 was almost as fast as the 6900xt, but for sure on par with the RX6800xt in GB5 tests. 155-160 metal scores. I must add I am using an SSDT for loading the pro drivers.
Nothing "has" to be enabled. Whatever works best for you (at least on Mac platforms).
@Syncretic, appreciate your work on patching the RX6x000 cards to work on the MacPros.
Would it possible to examine the VBIOS of the W6800 and see if the patcher can be updated to make it work for that card as well?
Happy to report my Powercolor 6900 XT Red Devil Ultimate is up and running in Monterey 12.4 on my 5,1. Doing some tests now but everything appears to work correctly.
Big thanks to @Syncretic and also @tsialex for pointing me in the right direction (6900 XT cards with XTXH like mine are not supported in Mac OS).
I tried spoofing the card in OC at first but wasn't successful. What I did then was to flash the normal (non-XTXH) and patched Red Devil bios to the "silent" bios switch of the card using my Ubuntu server. That way the card boots fine in Monterey and Windows 10 using the silent bios/switch as well as both switch positions in Windows 10. This will suit me fine until if/when these cards are natively supported.
Benchmarks:
Dual 5,1 X5670 2.93Ghz and 96GB RAM. Not sure if these are normal scores but here goes:
Monterey:
LuxMark 3.1, 56900.
Geekbench 5, 110000 for OpenCL and 142000 in Metal.
Windows 10 (silent bios):
LuxMark 3.1, 59000
Geekbench 5, OpenCL: 178000
Windows 10 (XTXH, OC bios):
LuxMark 3.1, 59000
Geekbench 5, OpenCL: 186500
Card was too long to fit but I've made a PCI fan mount you can 3D print yourself for free, you can read more here:
Big thanks to @Syncretic and also @tsialex for pointing me in the right direction (6900 XT cards with XTXH like mine are not supported in Mac OS).
I tried spoofing the card in OC at first but wasn't successful. What I did then was to flash the normal (non-XTXH) and patched Red Devil bios to the "silent" bios switch of the card using my Ubuntu server. That way the card boots fine in Monterey and Windows 10 using the silent bios/switch as well as both switch positions in Windows 10. This will suit me fine until if/when these cards are natively supported.
Benchmarks:
Dual 5,1 X5670 2.93Ghz and 96GB RAM. Not sure if these are normal scores but here goes:
Monterey:
LuxMark 3.1, 56900.
Geekbench 5, 110000 for OpenCL and 142000 in Metal.
Windows 10 (silent bios):
LuxMark 3.1, 59000
Geekbench 5, OpenCL: 178000
Windows 10 (XTXH, OC bios):
LuxMark 3.1, 59000
Geekbench 5, OpenCL: 186500
Card was too long to fit but I've made a PCI fan mount you can 3D print yourself for free, you can read more here:
Attachments
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Although not supported it can be spoofed. See here:
It is not enough to just spoof the device-id in the properties. The card has to be properly attached in the registry without any
pci-device@ bridges. Those names have to resolve to new (or existing, but then use scope instead of device) devices called BRG0, BRG1, etc or something else.See here:
GitHub - TylerLyczak/Unsupported-6900XT-Hackintosh-Fix: A fix for hackintoshes to get an unsupported 6900XT gpu to work
A fix for hackintoshes to get an unsupported 6900XT gpu to work - TylerLyczak/Unsupported-6900XT-Hackintosh-Fix
github.com
Although not supported it can be spoofed. See here:
It is not enough to just spoof the device-id in the properties. The card has to be properly attached in the registry without anypci-device@bridges. Those names have to resolve to new (or existing, but then usescopeinstead ofdevice) devices called BRG0, BRG1, etc or something else.
See here:
GitHub - TylerLyczak/Unsupported-6900XT-Hackintosh-Fix: A fix for hackintoshes to get an unsupported 6900XT gpu to work
A fix for hackintoshes to get an unsupported 6900XT gpu to work - TylerLyczak/Unsupported-6900XT-Hackintosh-Fix
I know but spent hours trying that and couldn't get it to work.
hi professionals , i made flash 6900xt tuf gaming in mac pro 5.1 .dual x5690 ,64 gb ram 10600 ,2 tb nvme evo plus, 3x 2tb hdd,pixlasmod, 34 inch mi display 3440x1440 144hz, mac os Monterey 12.4, windows 10 , opencore patcher latest. i wanna be gaming at windows with this . but i have issue with that. all benchmark is perfect but fps in all game very poor than rx580.
for example dota2 at ultra setting fps between 80-100(rx 580 144), cod warzone ultra setting 70-90(rx580 50-70) . and many games with this result. gpu usage 60-85%. what can i do for this poor performance?
for example dota2 at ultra setting fps between 80-100(rx 580 144), cod warzone ultra setting 70-90(rx580 50-70) . and many games with this result. gpu usage 60-85%. what can i do for this poor performance?
Congrats of your new card. providing Geekbench 5 results in both macOS and Win would be helpful/better to assess if there are indeed issues with your card. Gaming FPS depend on many factors, as you know, and you might be actually getting some reasonable FPS from those games after all. Unclear whether any of the games you mention offer Ray Tracing, and if so, whether you had it on and at what setting etc. RX580 does not support Ray Tracing and RX6900XT does, so that already would make a big difference in resulting FPS (i.e. Ray Tracing being very GPU intensive etc). Also just a friendly suggestion, for gaming specific settings/issues it might be best to start a new thread, this thread seems to be primarily about flashing NAVI2 cards and providing reports on those card patches/installs.
i tested drivers from 2018 until 2022 with clean install windows 🫣
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Since the RX-6900 came out in 2020, you should definitely stick with 2022 drivers...
Can you confirm that you are running Adrenalin 22.5.1?
Also, does your card have a BIOS switch? If so, what position is it on?
i still 22.5.1 yet, asus tuf have 2 bios and i flashed first of them. another bios is normal , this is defferent between sapphire cards (performance mode- silent mode - software mode)
i tested adrenaline 20.5.1 until 22.6.1
Since I haven't seen it mentioned in this thread at least. For those complaining about the size of these cards, I got my hands on a Dell (Alienware) 6800 XT, and thanks to @Syncretic it's working perfectly, at least for my use cases. 2-slot, and doesn't require a PCI fan mod. Still wish MFC could react to the GPU temps, but according to RadeonGadget, this thing seems to run cooler than my reference RX580 while dancing on its grave.
