File:How to Flash an ATI Radeon HD 5770 Graphics Card for a Mac Pro

This is how to flash an ATI Radeon HD 5770 graphics card for use on a Mac Pro. This method should work for most variants of this card, and should work with any model Mac Pro. To complete this process, you'll need a flash drive, a PC running Windows, a PC with a PCIe slot to use for flashing, and a machine running Mac OS X.

Links:

ROM tools: http://dosdude1.com/files/gpuflashing/5770flash.zip

Terminal commands: http://dosdude1.com/files/gpuflashing/5770commands.txt

Rufus: https://rufus.akeo.ie/downloads/rufus-2.8.exe

ATIFlash: https://hw-lab.com/atiflash.html