Shout out to Xanderon for making a super easy method to flash the vbios of a gpu in a 2011 or 2010 imac. This method is WAY easier because all you need to do is copy some files over to a flash drive. No need to partition your main disk or create a linux install or anything! Only takes up ~350mb too!
The thread:
https://forums.macrumors.com/threads/...
My end-end instructions doc:
https://docs.google.com/document/d/14...
Full gpu upgrade video:
• 2011 iMac GPU Upgrade Now with Bright...
My Patreon Link: / curtisgross
Bitcoin donations appreciated: 17aMzAJSTUdxW2UJrTiNZyVSCaWP3d6RHC