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I have given up. I sold my 5700XT on Ebay..

Hi Another update. I have moved on to Opencore and Big Sur. I installed the 5700XT and it's still crashing.. However, it does recover. Here are the logs: 2020-08-22 07:42:19.599830-0400 localhost kernel[0]: (IOAcceleratorFamily2) AMDRadeonAccelerator: IOAccelDisplayPipe (fbindex=1)...

Hi Another update. Problem solved. I didn't have my BIOS settings set correctly. I assumed that if it worked on Clover, it would be fine under Opencore.. Thanks again for all the help everyone.. I even managed to get Big Sur up and running.

Quick update.. I tried the two EFI's that @tedyun mentioned and neither booted in Catalina.. I made sure to update all fields for SMBIOS as well. I also made sure the issue wasn't the firmware on my Samsung EVO 970+.. The firmware installer indicated that I had the current firmware. So I am...

Yes.. here is a screenshot of my EFI folder on the USB drive I am using:

Just did.. Thanks.. I have both but switched back to RX 580 because the 5700XT on Catalina was causing lots of desktops freezes.. which apparently might be fixed in Big Sur.. Thus the reason for me starting to look into open core. ;-)

The iGPU is disabled in the BIOS.. I just use the RX 580..

Thanks.. The NVME is for Windows. I removed it and got the following:

No, it does not.

The SSDT's are prebuilt.. Here's what I see right after it freezes:

Thanks.. I had gone through that.. Went through it again.. No luck.

Thanks for the reply. I had no idea that Sanity Checker existed! Very useful. I corrected the errors.. Same problem though.. I made sure to clear the nvram before booting. See attached. Also, stupid question, but to just make sure I haven't made a mistake here is the Intel processor I am...

****** SOLVED **** The issue was BIOS. I did not have all the correct settings. Just because your BIOS settings work in Clover does not mean they will work in Opencore. ******** Hello I am trying to install Big Sur. I am having issues getting OpenCore to boot. I have a running Catalina...

Ya, forget that.. Two crashes in 24hrs or so.. It was wishful thinking.

I have done the same.. I'll keep you posted.

Anyone know if the new 10.15.6 supplemental improves anything for those having issues with the 5700XT ?

But it must be the same architecture no ? Wouldn't this be the first NAVI based GPU in an Apple product? I am trying to determine if this announcement will have any play in Apple fixing the drivers for NAVI chips.

New iMacs are out and they support the RX 5700XT (prices are in Canadian)..

It's all explained at the start of this thread.. As soon as I switch back to my RX 580, problems go away.. It did get better with 10.15.5.. as in it would recover. But yesterday was a flat out freeze.. Audio worked, the clients could hear me.. But my desktop was dead.. I waited a minute or two...

Well you got me all excited and I switched to iMac15,1 from iMacPro1,1 and no luck for me.. Froze during a Zoom call.. Switching for me is a PITA too since I have to move a bunch of licenses I have for various software that appears to be pinned to board numbers and other hardware/software tags...