psu failures

Hello, Well, It's been 4 years of my Gaming PC I build for myself. It was my first time so I might purchased some components which you'll tell that I made mistake maybe. Anyways let's fast forward, From these several months I noticed my PC got into so many blue screen crashes like so much...

Three days ago I built a brand new build. Before continuing, the core components are as follows: Mobo: MSI x570 MPG Carbon Pro WiFi CPU: AMD Ryzen 7 3700x GPU:EVGA RTX 2080 Ti RAM: 32GB Corsair Vengeance RGB Pro PSU: Corsair RMx 850 (I know 850w is a lot for my build, but it was on sale at Best...

I´m about to get a Dell Inspiron 15 7000, which is a laptop that comes with Geforce GTX 960M. Should I got for the i5-6300HQ processor, or i7-6700HQ? Will the difference be really noticeable for games? Isn´t the graphic card the main factor? Thanks