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[Success] Radeon RX 6800 XT - Big Sur

Joined
Aug 17, 2020
Messages
113
Motherboard
Gigabyte Z490 Vision D
CPU
i9-10850K
Graphics
RX 6900 XT
Well, I turned off my speedy RAM profile and still got 191K. Will keep poking around...
I actually had a test hit 196k today while I had a bunch of stuff open and working. Not convinced geekbench is the best judge of speed… what version of MacOS are you using? Others have reported slower performance on the latest…
 
Joined
Aug 17, 2020
Messages
113
Motherboard
Gigabyte Z490 Vision D
CPU
i9-10850K
Graphics
RX 6900 XT
I was hopeful but no love here either.
Seems like the GPU data isn't even getting to the machine in MacOS.
*Turns out VirtualSMC doesn't have NAVI support for GPU Temps.
FakeSMC3 seems to offer this. I might try it out later today...

View attachment 525535
FakeSMC didn’t bring temps to Istats menus or HWMonitorSMC2. :(
 
Joined
Dec 4, 2010
Messages
129
Motherboard
Probook 430 G3
CPU
i3
Graphics
HD 520
Mac
  1. MacBook Pro
Mobile Phone
  1. iOS
I actually had a test hit 196k today while I had a bunch of stuff open and working. Not convinced geekbench is the best judge of speed… what version of MacOS are you using? Others have reported slower performance on the latest…
Running 11.5 Big Sur. I don't know how good Geekbench is these days but it is giving pretty consistent results.
 
Joined
Apr 30, 2018
Messages
46
Motherboard
Gigabyte Z390 M Gaming
CPU
i9-9900K
Graphics
RX 5700 XT
Mac
  1. iMac
Classic Mac
  1. iMac
Mobile Phone
  1. iOS
Just got 6900xt to replace my 5700xt, remove agdpmod=pikera will cause blackscreen after boot(iMac Pro 1,1), and displayport only run 4k@30fps (HDMI working at 4k@60fps). Had updated big sur to 11.5.1, and clean nvram, but nothing good. Anyone can help?
 
Joined
Apr 30, 2018
Messages
46
Motherboard
Gigabyte Z390 M Gaming
CPU
i9-9900K
Graphics
RX 5700 XT
Mac
  1. iMac
Classic Mac
  1. iMac
Mobile Phone
  1. iOS
Just got 6900xt to replace my 5700xt, remove agdpmod=pikera will cause blackscreen after boot(iMac Pro 1,1), and displayport only run 4k@30fps (HDMI working at 4k@60fps). Had updated big sur to 11.5.1, and clean nvram, but nothing good. Anyone can help?

After turnoff whatevergreen, remove agdpmod=pikera won't cause blackscreen. But using displayport could cause blackscreen, while HDMI still working fine. Does anyone know how to fix displayport?
 
Joined
Aug 17, 2020
Messages
113
Motherboard
Gigabyte Z490 Vision D
CPU
i9-10850K
Graphics
RX 6900 XT
After turnoff whatevergreen, remove agdpmod=pikera won't cause blackscreen. But using displayport could cause blackscreen, while HDMI still working fine. Does anyone know how to fix displayport?
I just ran into the same issue recently. My monitors were old. Manufactured around 2009-2010… Bought new monitors and everything worked great. The card seems to have many issues with older display port monitors that the 5700 worked fine with.
 
Joined
Apr 30, 2018
Messages
46
Motherboard
Gigabyte Z390 M Gaming
CPU
i9-9900K
Graphics
RX 5700 XT
Mac
  1. iMac
Classic Mac
  1. iMac
Mobile Phone
  1. iOS
I just ran into the same issue recently. My monitors were old. Manufactured around 2009-2010… Bought new monitors and everything worked great. The card seems to have many issues with older display port monitors that the 5700 worked fine with.
I'm using Dell U3219Q monitors, which was released in 2019. Can not understand which part break DP port, whatevergreen 1.5.1 can only run 4k@30fps.:crazy:
 
Joined
Apr 11, 2014
Messages
65
Motherboard
ASUS X299 SAGE/10G
CPU
i9-7980XE
Graphics
Radeon VII
Hey guys, I've got a weird one here, I've got 2 RX 6900 XT, when I had 1 everything was perfect all the monitors were fine, but when I finally got the water loop up and running and got the second card in, the monitors will go blank after boot, reconnecting the 2 monitors (HDMI,DP) will bring them back plugging in the 3rd one kills the screens, WEG does nothing and the second card shows as DISPLAY.

What am I doing wrong?



Screen Shot 2021-07-30 at 4.26.01 PM.png

Screen Shot 2021-07-30 at 4.35.04 PM.png
 
Joined
Aug 17, 2020
Messages
113
Motherboard
Gigabyte Z490 Vision D
CPU
i9-10850K
Graphics
RX 6900 XT
I'm using Dell U3219Q monitors, which was released in 2019. Can not understand which part break DP port, whatevergreen 1.5.1 can only run 4k@30fps.:crazy:
I had a problem this weekend where one of my displays would work at 30hz only. Didn’t know this existed as it’s hidden in the menus but you can set the refresh rate manually in the display options.

system preferences > displays > option + click “scaled” > click “show low resolution modes”

this will bring up the refresh rate pull down and you can manually select.

Hope it’s as easy as this for you!
 
Joined
Oct 10, 2015
Messages
921
Motherboard
Z370 AORUS Gaming 3
CPU
i5-9600K
Graphics
RX 580
Mac
  1. MacBook
  2. MacBook Pro
Mobile Phone
  1. iOS
AMD has announced W6600 so RX 6600 XT should be supported by macOS. Anyone wants to try after August 11?
 
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