Mac Pro graphics card upgrade questions [duplicate]

Solution 1:

From what I understand, it's not the Mac Pro, it's the graphics card that needs to be flashed so that it's "Apple approved"

For example, on MacUpgrades, they list an Saphire Radeon RX 580 with 8GB RAM

It has been flashed to work on the Mac Pro 2008 (MacPro 3,1) - Mac Pro 2012 (MacPro5,1) models.

I ran across a video of the flashing procedure for a newer (but same family) of video cards - though the procedure does require the use of Windows (meaning Bootcamp).

You will need:

• GPU-Z to back up your cards firmware
• ATIWinFlash to flash the firmware
• The EXACT firmware for your Mac and video card

I currently don't have the required components to test/verify this procedure so proceed with caution. If this is something you are not used to doing, definitely seek out someone who can assist you with this as you run the risk of bricking your GPU.