Hi, I have a Clevo P150SM (Not SM-A, just SM) with a GTX 770m, bought over 2 years ago.   I wanted to upgrade to a GTX 9xxm series, a GTX 970m or even a 980m to max it out. However I have 2 issues. I don't know if I have to do something on the BIOS for the 9xxm series card to work, I hear a lot that I have to modify the BIOS but it's not clear so I would really appreciate if someone knowledgeable adresses this for me.   The 2nd issue, is more to do about the 980m only. My