GPU device ID on a real Mac VideoBIOS

[SPIguy]

Hi.

This is my first post here on the forum. I posted this here because it looks to be the closest forum to my thread subject.

There is a huge issue right now in the BGA repair community regarding 6th gen HD6750M and HD6770M GPUs.
It's simply impossible to buy GENUINELY new ones anymore. They are now all re-balled or re-marked crap from china. There is nothing new on the market worldwide.

The promising alternatives are the 7th gen HD7670M and HD7610M because they have the same BGA pin pattern and same architecture.
The idea is to change the device id in the VBIOS from that of the HD6750M (0x6741) to that of the HD7670M (0x6840) so the card is recognised. There is a further issue still because the AMD7000Controller.kext does not have the 0x6840 dev id in the info.plist.

Is there a way the device IDs can be changed to recognise the card and get an initial image on startup and then somehow fool the OS into seeing the card as one of the supported device IDs in the AMD7000Controller.kext?

If I upload the .bin would someone be willing to take a look at this pease?