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Radeon VII (and new AMD gpus) compatibility

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Hmmm... Interesting... I'll have to give it a try with iMacPro1,1.

Right now, I have cables from two of the DisplayPort outs to two Mini DisplayPort ins on my Thunderbolt 3 card.
Then I use the DisplayPort out on the Thunderbolt 3 card to my monitor.

I did it so that I wouldn't lose those two little cables that came with the Thunderbolt 3 card. It' supposed to allow for 5K support (assuming the DisplayPort outs from the video card are working) but I don't have a 5K monitor to test...

Does not work with iMac Pro, Just like Mac Pro 5,1 - 6,1 I even think the Mac mini SM works also. Basically any Mac SM that is not an all in one.

PS if you have a Titan Ridge you should be able to get 8k... As I understood it the Titan Ridge takes DP 1.2 and converts it to DP 1.4
 
Does not work with iMac Pro, Just like Mac Pro 5,1 - 6,1 I even think the Mac mini SM works also. Basically any Mac SM that is not an all in one.

PS if you have a Titan Ridge you should be able to get 8k... As I understood it the Titan Ridge takes DP 1.2 and converts it to DP 1.4

Ah. I see.

Yes, I have Titan Ridge but, again, no monitor to test with. Lol
I'm very happy with my 4K and don't intend to change any time soon.
 
Ah. I see.

Yes, I have Titan Ridge but, again, no monitor to test with. Lol
I'm very happy with my 4K and don't intend to change any time soon.

Using Mac Pro 6,1 does enable all the ports I just forgot it breaks HVEC encoding/decoding.
 
@juliaan88 @Benlehot

I purchased an AMD reference Vii direct from AMD and their web store. For me personally, it seems I only see success stories with the Sapphire, but if these cards are all supposed to be reference clones, how can this be? They should not be different.

I have done deep research and troubleshooting on this over the past week; the slow down/lag and reboots are being caused by a panic within AppleGFXHDA which is responsible for driving display audio (not to be confused with AppleHDA which drives on-board sound). I have pulled my card back out for about the 20th time and went back to my Vega 56 because it's been so tedious swapping cards in and out every day trying new things to troubleshoot but then having to go back to Vega 56 to do actual work on the computer.

Is it possible to install a Sapphire VBios onto an AMD reference and test?

If you do not need display audio, it would be worth testing blocking or removing AppleGFXHDA.kext within S/L/E temporarily to see if this stops the lag/kernel panics.
I did this and I am having zero issues. Use the DOS version of the flasher and force it to overwrite the AMD bios with the Sapphire one. Sound over HDMI works and the system hasn't hung.
 
Hi, I'm a noob.

I got an ASRock VII (should've bought a sapphire after reading the previous thread), I tried to make it work with Catalina.
My mobo is ASRock X570 ITX.

I just followed the AMD vanilla tutorial and didn't do almost any changes to config.plist. And I set SMBios is iMacPro 1,1.

After updating the firmware of Samsung 970 Evo plus (this one got me crazy.) I can install the Catalina and boot it into the system flawlessly.

The problem is: the system detected the graphic card perfectly, but the GUI is like installing an OSX in a VM without any graphic drivers. I have a solid color dock style, moving window is very laggy, the characters are not showing correctly (just gone when typing) in url input and pictures flashing in chrome.

I've installed Lilu, whatevergreen and AppleALC in EFI.

Don't know where to go now. Please help if someone has the same problem. Thanks.
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hi guys. is someone here experiencing audio loss trough cdmi/display port?
i macpro1,1 system def, radeon VII connected trough display port to my sounder. sometimes I have to unplug and replug the hdmi cable to have the sound working again
catalina 10.15
 
I did this and I am having zero issues. Use the DOS version of the flasher and force it to overwrite the AMD bios with the Sapphire one. Sound over HDMI works and the system hasn't hung.
Hi niner, can you please let me know, which Sapphire bios you flashed in? I tried today, unfortunately the kernel panic problem still there.
 
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Hi niner, can you please let me know, which Sapphire bios you flashed in? I tried today, unfortunately the kernel panic problem still there.
Ok so that actually didn't work. The problem is so sporadic that the extra time I got I thought it was fixed. Still had the issues but I did find out what was the problem.

There is a setting on my board (ASUS Rog Strix Gaming z390-I) and you should check yours "Hyper M.2x16" which changes the speed of the PCI ports for the NVME sticks. This was causing my Radeon card to run at 8x instead of 16x which was causing ALL the issues. Once I disabled this everything worked perfectly. If you don't have this setting then verify your Radeon is running at 16x in your BIOS. I also read that if you have 8x cards installed in other PCI slots that can affect the speed of your GFX card. If you can't find out if your card is running at 16x and you do have other PCI cards installed then I'd remove everything but the GFX card and see if that works. Let me know if this works or if you need anything else.
 
moved to another thread
 
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