Can the display output be enabled by modifying the vBIOS of the Radeon Pro V620?

[lpeg]

I recently purchased a Radeon Pro V620 and discovered that it has a hidden miniDP output port, but it wasn't functional. After flashing it with the W6800 BIOS, the port started working, but the stream processors were also reduced. Upon further research, I found that using AtomBIOSReader to decode the BIOS, and then using the decoded addresses and offsets with HexComparison to modify the BIOS parameters might be a solution.

I would like to ask whether it is feasible to modify the W6800 BIOS to display the correct number of stream processors or to alter the V620 BIOS to enable the display output. Any guidance on this would be greatly appreciated.

 

[VuurVOS]

Did you also compare it with the AMD RX 6800 XT reference bios?

 

[lpeg]

Did you also compare it with the AMD RX 6800 XT reference bios?

Yes, I have tried flashing the 6800XT's VBIOS, but the miniDP interface does not work properly, and the flash memory has also been downgraded to 16GB

 

[VuurVOS]

Can you share/upload the V620 with GPU-Z?

 

[lpeg]

Can you share/upload the V620 with GPU-Z?

yes,I will upload it later

 

[thousandTabs]

Just curious about this and if anything worked or if there were any tools that allowed you to modify the v620 bios. Thanks!

 

[LabRat 891]

I recently purchased a Radeon Pro V620 and discovered that it has a hidden miniDP output port, but it wasn't functional. After flashing it with the W6800 BIOS, the port started working, but the stream processors were also reduced. Upon further research, I found that using AtomBIOSReader to decode the BIOS, and then using the decoded addresses and offsets with HexComparison to modify the BIOS parameters might be a solution.

I would like to ask whether it is feasible to modify the W6800 BIOS to display the correct number of stream processors or to alter the V620 BIOS to enable the display output. Any guidance on this would be greatly appreciated.
View attachment 358886

Just curious about this and if anything worked or if there were any tools that allowed you to modify the v620 bios. Thanks!

Have you tried the W6900X's vBIOS?

Apple W6900X VBIOS

32 GB GDDR6, 500 MHz GPU, 194 MHz Memory

www.techpowerup.com

Vega 56s can take a Vega 64 vBIOS

7900XT's can take XTX vBIOS (IIRC)
9070s can take 9070XT's vBIOS

The complication comes in w/ the Apple-specific part, part. The actual Apple cards will run on a PC fine, IIRC.
The issue I worry about is bricking the card from missing ancillary hardware or some flavor of UEFI certificate violations.

 

[thousandTabs]

Have you tried the W6900X's vBIOS?

Apple W6900X VBIOS

32 GB GDDR6, 500 MHz GPU, 194 MHz Memory

www.techpowerup.com

Vega 56s can take a Vega 64 vBIOS

7900XT's can take XTX vBIOS (IIRC)
9070s can take 9070XT's vBIOS

The complication comes in w/ the Apple-specific part, part. The actual Apple cards will run on a PC fine, IIRC.
The issue I worry about is bricking the card from missing ancillary hardware or some flavor of UEFI certificate violations.

Thanks for the suggestion! I can try this. I already bricked the card once playing with other vbioses... the 6800 XT bios I downloaded from techpowerup didn't work for my v620 and I learned how to unbrick an AMD GPU last weekend

In a similar vein to Ipeg, I was hoping there was a simple fix where I could take the v620 bios and change the device IDs so that Linux would download compatible drivers (like the W6800) for the card without sacrificing the compute units. The v620 drivers won't init correctly on Ubuntu no matter what I do, unfortunately.. but the w6800 bios manages to get the card to work. I'm not sure how the bios firmware signing works, and if the card would even work if the v620 bios was modified to look like a w6800 device. Any insight on this would be very helpful as well!