iMac 2011 GPU upgrade to NVIDIA 770M with new VBIOS

Do this upgrade at your own risk! You CAN damage your iMac or cause harm while dealing with exposed electronics. Link to iFixit teardown guide, the 27“ variant is nearly identical: Intel EMC 2428 GPU Card Replacement/5980 Link to Macrumors forum: Link to Linux flash tool: I do not own any of the music. The rights go to the corresponding owners: Magic by Allerlei von Nicolai | Music promoted by Creative Commons Attribution 3.0 Unported License Wandering by Numall Fix | Music promoted by Creative Commons Attribution 3.0 Unported License