G751JT

I want to upgrade my Geforce GTX 970M to a newer processor. Is it possible and how exactly do I go about doing it? Any advice is greatly appreciated. Specs:

hi, I have a Asus G751JT, sometimes like once or twice a month it will reboot randomly in the middle of idling or anything and go to the BIOS. I checked the system was not overheating (it was idling). Any ideas what is causing this? I'm on Windows 10. Thanks.

Im interested with a gaming laptop which is ROG G751 JT with GTX 970m GPU. So I wonder what will I face after 2 years. I meant like the performance, what will user usually realise after 2 years? Or simply what will usually happen to laptop after 2 years? How much do you think that after 2...