iM 4,1-14,4 EnableGop: Pre-OpenCore GOP support for EFI-era iMacs and Mac Pros

[Bmju]

Seems not NVRAM, but vBIOS flash chip

That is an NVRAM chip, even though it's not the BIOS NVRAM chip.

 

[Bmju]

@Tratkazir_the_1st - Any success report from yourself yet from the flash to fix Radeon VII bug?

 

[Tratkazir_the_1st]

@Bmju Still thinking... Actually there are 2 Macs with such cards. But I don't want to brick any of them . M.b. at week-end.

 

[Bmju]

@Bmju Still thinking... Actually there are 2 Macs with such cards. But I don't want to brick any of them . M.b. at week-end.

Well, I believe it will just work for you ... but it's still your risk (!) so ....

If you want to be really certain you won't brick it, you need to buy a USB CH341A plus SOIC clip, and you need to practice clipping on to the vbios flash chip and reading from it, and really, to be sure, writing back to it what you read from it; i.e. practice removing the graphics card and then reading/writing to its flash using a clip and another computer.

Then you will have a backup and you can basically be sure that you have the technology to restore it to its previous state if needed!

But also, given the other success stories above, it should really just work....