rx590 overheat

So I recently bought Rust on the Steam autumn sale(have bought it before but refunded it) and I'm experiencing this issue when I lower the graphics and every other setting to low or medium and try to go on the Rust server list/try to join a server my PC's screen goes black and the fans go to...

Ive had my pc for about 3.5/4 years now and i had to change gpu twice since the first 2 were faulty, ive had the asrock 590 for about 2/2.25 years now and ive had soo many problems with it. Recently i downloaded Rust and tried to play but sitting only in the menu gave me a black screen with 100%...

First off this video is crucial to understanding why I did what I did. If you've been troubleshooting a RX 590 Fatboy odds are you've already seen this video:RX 590 Teardow Credit where credit is due, this guy has an amazing channel for real computer nerds. So I got an RX 590 Fatboy thinking it...