Yes, you can put in the 9xxm series. The kit is easily enough applied, get onto notebookreview and search their forums. I currently have my r4 with a 980 on a custom bios, i got from that site for win 8.1 that's flawless.
And to the person that posted laptops aren't upgradeable. you really need to lookup information instead of spilling out garbage for new people that don't know any better. Certain laptops, 17x r4 being one of them, are completely upgradeable from the floor up. My r4 is running fallout 4 on ultra, 60fps, and is over 2 years old.