Alienware m17x r3 460m to 780m question

i know this subject has been beat to death pretty good, but i have a question i wasnt able to answer myself or threw any other post.

Im doing research before i buy the card to see if i am able to do this myself, i have installed the A12 bios, and followed the instructions here by j95

"1) Enter the A12 unlocked bios M17x R3 BIOS A12 - unlocked & 'SATA fix' , disable the integrated graphics Advanced Menu>Video...

Alienware m17x r3 460m to 780m question