Go here Confirmed and Possible Flashable GTX680 Models and here Step-by-Step Instructions for Flashing GTX680, everything you need to know.What are the finer nuances of flashing a PC GTX 680 graphics card with Mac ROMs? Specifically are there multiple versions of the Mac ROMs to choose from and does it really make a difference which brand of card you start with (eg Asus, EVGA. Gigabytes, MSI)?