Get any reference GTX 680, EVGA is a good choice. Here is a
confirmed list if you want to consider other cards too, including non-reference cards.
4GB cards are also possible, that's what I have.
Pre-requisites:
- You will need Windows running on the Mac Pro.
- You will need to download nvflash.
- If you get a 2GB model, you'll need to download the ROM for a 2GB card.
- If you get a 4GB model, you'll need to download the ROM for a 4GB card.
Then use the following procedure in Windows. Don't turn off the power, reset, or try to flash during a period of electrical unreliability (storm, planned rolling brownouts, etc.)
1) Copy all the related files to a single folder that is easily accessible from the command prompt. I suggest you make a new folder C:\mango. At a minimum it should include the following:
nvflash.exe
GTX680-4GB-ROM.rom (or whatever the 2GB ROM is called)
2) Open a command line prompt. Click
Start button, type
CMD, and press
Enter. A command line window will open.
3) In the command line window, navigate to the folder with the files. If you used my suggestion, the command would be:
4) Backup your existing firmware, so that you can flash it back to factory if needed:
Code:
nvflash --save original.rom
4) Flash the new firmware (filename assumes the 4GB ROM):
Code:
nvflash -4 -5 -6 GTX680-4GB-ROM.rom
5) If it asks for confirmation, press yes. When it says to wait, wait.
6) After it is successful, reboot and you will see boot screens.
7) Celebrate!
Alternatively, I just upgraded to a GTX 980 and would like to sell my EVGA GTX 680 FTW 4GB. If you are interested in a used one that's successfully flashed, has been working fine for years in OS X and Windows, and has faster clocks than stock (it's a FTW edition card). If so, PM me.