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List of AMD Radeon Navi cards in Catalina That work.

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Any word on the PowerColor Red Dragon?
I'm constrained to "true 2 slot" maximum on my build.

(would prefer non-blower)
 
The RX 5700 XT Red Dragon work.
7F7471C4-99BB-4A66-9BE4-FC3A2D22FD44.png

Benchmark of silent bios
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Excellent!
I will probably wait for this OS version to go non-beta and then upgrade from my Strix 570
 
After enabling WhateverGreen, with agdpmod=pikera it works after all.
Thank you, this fixed my Rx 580 issue (i removed the whatevergreen earlier to fix the issue, but can't disable IGPU), now with this flag, I'm able to disable IGPU.

I'm wondering what is different between Board-id and Board-ix ?
Also, Which SMBIOS are you using ?
 
You're most welcome! I'm just merely passing on wisdom of the elders from this fine forum.

I'm on iMac19,1.
 
Sapphire RX 5700 XT reference. No dual bios that I can see. DP didn't work so I just plugged in the HDMI. I didn't get the full 5120x1440 resolution or the Scaling option. I just used RDM to adjust resolution for now. Just installed it and haven't even booted up the windows side yet.

Have you found the approach to fix it? Thanks.

And btw, anyone tried these two below with DP to 4k or 5k? I really want to get one of them recently. Much thanks.

Sapphire Pulse 5700XT
Sapphire Nitro + 5700XT
 
Tried Sapphire Pulse 5700XT on XG-STATION-PRO connect to DELL Inspiron 7590.
OS X can detect and load driver, but no screen if connect monitor on 5700XT.

Not sure it caused by Whatevergreen or TB3 configuration.
 
AMD's own Reference 5700XT works
 
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