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[Sticky] Radeon RX 6800 / RX 6800 XT / RX 6900 XT for macOS -> AMD Navi RDNA2 Support added in 11.4 Beta  

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joevt
(@joevt)
Noble Member
Joined: 4 years ago
 

@arvin, can you post AGDCDiagnose output? That will include the EDID of the display and some connection info.

The RDNA 2 cards are the first cards supported by macOS to support HDMI 2.1. Does the Apple drivers allow HDMI 2.1?

 

Mac mini (2018), Mac Pro (Early 2008), MacBook Pro (Retina, 15-inch, Mid 2015), GA-Z170X-Gaming 7, Sapphire Pulse Radeon RX 580 8GB GDDR5, Sonnet Echo Express III-D, Trebleet Thunderbolt 3 to NVMe M.2 case


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arvin
(@arvin)
Active Member
Joined: 1 week ago
 

@erik_tank, I have not tried Windows with Bootcamp, but it seams other here have done it. Windows to my understanding supports 8K. 

With respect to Mac support for 8K with 6800 xt

A. I could be that MacOS 11.4 beta support the RDNA 2 cards such as 6800 xt, but not at 8K resolution.

B. ..or that 11.4 supports  high bandwidth video over DisplayPort 1.4 but not HDMI 2.1, i.e. that MacOS does not fully support all features incl. both the outputs from the new AMD 6000 series cards. Mosts 8k TVs seams to have only HDMI 2.1, with no support for DisplayPort 1.4. If this scenario is correct the Active DP 1.4 to HDMI 2.1 adapter from Club 3D could be a solution.

 

Arvin
Mac mini 2018 i5 64GB RAM, MacOS 11.4, eGPU Razer Core X Chroma with ASUS TUF AMD Radeon 6800 XT
MacBook Pro M1 16GB, MacBook Pro late 2013 i7 16GB


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arvin
(@arvin)
Active Member
Joined: 1 week ago
 

@joevt

 

thanks for your help. From the Mac system report:

(after comes the AGDCDiagnose report)

 

Spoiler
AGDCDiagnose report

 

Arvin
Mac mini 2018 i5 64GB RAM, MacOS 11.4, eGPU Razer Core X Chroma with ASUS TUF AMD Radeon 6800 XT
MacBook Pro M1 16GB, MacBook Pro late 2013 i7 16GB


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norcom
(@norcom)
Active Member
Joined: 1 year ago
 
Posted by: @arvin

Dear community,

have any of you been able to get 8K resolution using MacOS Big Sur beta 11.4 (with AMD Radeon 6000 / RDNA Navi 2) using either HDMI 2.1 (or DisplayPort)?

My configuration is Mac Mini 2018 connected to a Razer Core X Chroma with an Asus TUF AMD Radeon 6800 xt card. The graphics card is connected to a Samsung 75" Q800T 2020 8K monitor.

I only get 4K @ 60 hz using the HDMI 2.1 output from the Radeon 6800 card. The 11.4 beta of MacOS seams to work plug and play with the new AMD RDNA 2 cards, but not at full resolutions. 

I'm using this as part of a coding project, not specifically gaming. But I would like to get 8K resolution for the simulation I'm doing.  

Thanks, A.

Have you tried using DisableMonitor or other similar applications to manually change the resolution?

https://github.com/Eun/DisableMonitor

DisableMonitor is the only way I can get my Monoprice Dark Matter 49" to do 5120x1440 @120hz. My monitor's not 8k or even 4k but there are just some resolutions MacOS doesn't show. DisableMonitor worked with my Razer Core eGPU with a 5700XT and directly from the MBP 16" via USB-C - DP1.4 adapter. I couldn't get 120hz doing TB3 to DP since TB3 only does DP1.2. I read that the Samsung variant of this monitor works fine (same panel different control board). So I'm guessing it's the control board that's not identified and supported directly.

 

 

 

2019 16" MacBook Pro (RP5500M) [9th,8C,H] + RX 5700 XT @ 32Gbps-TB3 (Razer Core X Chroma) + Win10 1909 [build link]  

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arvin
(@arvin)
Active Member
Joined: 1 week ago
 

@norcom, I’m using EasyRes to change the resolution quickly from the top menu bar. Some more resolutions show up there, but not >4K, not even 4K at 120hz. (My son gets 4k@120hz when he hook up the PlayStation 5) so there is something on the Mac side.

Come to think about it, mainly resolutions that is supported by the integrated graphics on the Mac mini 2018 seams to be available (Intel UHD Graphics 630). The TV is connected to the HDMI 2.1 connector on the 6800 xt. The AMD card works well with respect to performance in games and geekbench, e.g. >120K Metal score in Geekbench 5. So the problem is just the resolution. 

 

Arvin
Mac mini 2018 i5 64GB RAM, MacOS 11.4, eGPU Razer Core X Chroma with ASUS TUF AMD Radeon 6800 XT
MacBook Pro M1 16GB, MacBook Pro late 2013 i7 16GB


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norcom
(@norcom)
Active Member
Joined: 1 year ago
 
Posted by: @arvin

@norcom, I’m using EasyRes to change the resolution quickly from the top menu bar. Some more resolutions show up there, but not >4K, not even 4K at 120hz. (My son gets 4k@120hz when he hook up the PlayStation 5) so there is something on the Mac side.

Come to think about it, mainly resolutions that is supported by the integrated graphics on the Mac mini 2018 seams to be available (Intel UHD Graphics 630). The TV is connected to the HDMI 2.1 connector on the 6800 xt. The AMD card works well with respect to performance in games and geekbench, e.g. >120K Metal score in Geekbench 5. So the problem is just the resolution. 

 

I just tried EasyRes and it doesn't show the 5120x1440 option for my monitor. Funny enough that's the resolution I'm currently using after setting it with DisableMonitor. I would suggest trying a different application.

Whoops, my mistake. I was looking at the laptop screen and not the monitor. The 5120x1440 is available. Thanksf or the tip on the app! Smile

You can also read through this thread https://forums.macrumors.com/threads/8k-or-8k4k-display-support-in-macos.2221938/ and possibly try SwitchResX. It allows you to add completely custom resolutions. But that app is not free.

 

This post was modified 1 week ago
2019 16" MacBook Pro (RP5500M) [9th,8C,H] + RX 5700 XT @ 32Gbps-TB3 (Razer Core X Chroma) + Win10 1909 [build link]  

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chairokun
(@chairokun)
New Member
Joined: 4 years ago
 

If anyone is interested I have listed some benchmarks using the 6900XT with the imacPro under both macOS and Windows (including the specs below). 

Quick question, I am curious when using Geekbench or Luxmark in windows the Compute Unit readout is half of thats displayed under macOS (ie. 40CU vs. the 80CU) 

I am assuming this is just an error with the program's readouts under windows?

Is there a program or quick way to see the exact GPU info statistics/information regarding the Compute Units? EDIT:( AIDA64  running option GPGPU gives the proper 80 CU readout. Thanks @itSage )

(I quickly tried GPU-Z and CPU-ID software but didn't see this information.)=

Thanks.

 

MACOS

GEEKBENCH 5 (OpenGL) 118244 LINK

GEEKBENCH 5 (Metal) 169486 LINK

LUXMARK 3.1 (OPENGL - LuxBallHDR) 75778 (2 GPU) LINK

 

Apple iMac Pro 1,1 (2017)

OS: BigSur 11.14 Beta 1

CPU: Intel(R) Xeon(R) (Skylake-W) W-2150B CPU @ 3.00GHz

RAM: 128GB DDR4 ECC (32GBx4) @1333+/-1.2V - Quad-Channel, CR:1T, T:19-19-19-43, tRFC:467 - Micron Tech. 36ASF4G72PZ-2G6D2

NVME: Apple APPLE SSD AP4096

E-GPU: Akitio Node x1

PSU: Corsair RM750x (2018) 750W [80PLUS GOLD] PS794 CP-9020179-JP

GFX: Radeon Pro Vega 64 Compute Engine [64 units @ 1350MHz]

GFX: PowerColor Red Devil RX 6900 XT AXRX 6900XT 16GBD6-3DHE/OC [80 units @ 2660MHz]

 

BOOTCAMP

GEEKBENCH 5 (OpenCL) 148555 LINK

GEEKBENCH 5 (Vulkan) 159811 LINK

LUXMARK 3.1 (OPENCL - LuxBallHDR) 82474 (2 GPU) LINK

 

Apple iMac Pro 1,1 (2017) OS: Windows 10 Pro 20H2 19042.928

CPU: Intel(R) Xeon(R) (Skylake-W) W-2150B CPU @ 3.00GHz

RAM: 128GB DDR4 ECC (32GBx4) @1333+/-1.2V - Quad-Channel, CR:1T, T:19-19-19-43, tRFC:467 - Micron Tech. 36ASF4G72PZ-2G6D2

NVME: Apple APPLE SSD AP4096

E-GPU: Akitio Node x1 GFX: Radeon Pro Vega 64 Compute Engine [64 units @ 1350MHz]

PSU: Corsair RM750x (2018) 750W [80PLUS GOLD] PS794 CP-9020179-JP

GFX: PowerColor Red Devil RX 6900 XT AXRX 6900XT 16GBD6-3DHE/OC [40 units @ 2015MHz]

This post was modified 3 days ago

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

.

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arvin
(@arvin)
Active Member
Joined: 1 week ago
 

@norcom, ok with the Dell 32 inch 8k monitor, it seams that people have been able to achieve 8k at 30hz using only one of the DisplayPort inputs on that monitor, and SwitchResX to tweak resolutions manually. 

Still need to find a solution for 8k@60hz which should be possible with both DisplayPort 1.4 and hdmi 2.1. I will try SwitchResX over the next week and report back.

I will also try the Club 3D active DisplayPort 1.4  to HDMI 2.1 adapter (CAC-1085). This could be a solution if there is a limitation in MacOS with respect to HDMI 2.1. It looks like the Radeon 6800 xt only sends a hdmi 2.0 signal out when using MacOS (11.4 beta 1 or earlier).

 

Arvin
Mac mini 2018 i5 64GB RAM, MacOS 11.4, eGPU Razer Core X Chroma with ASUS TUF AMD Radeon 6800 XT
MacBook Pro M1 16GB, MacBook Pro late 2013 i7 16GB


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itsage
(@itsage)
Founder Admin
Joined: 4 years ago
 

@chairokun, In Windows you can download AIDA64 and run GPGPU to see.

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2020 13" MacBook Pro [10th,4C,G] + RX 6700 XT @ 32Gbps-TB3 (CM MasterCase EG200) + Win10 1903 [build link]  


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Fran Serrano
(@fran_serrano)
New Member
Joined: 3 weeks ago
 

@reinhard1004, I already installed 11.4 beta 2 and still no support for RX 6700XT. Only 6800, 6900 and 6900XT are supported for the time being. We'll need to wait a bit. Maybe in later beta versions the support for our card is added. I would not expect that a particular model like ours is forgotten in the bin.

Cheers,

Fran

 

Surf, drums, Java/script


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