Question RTX 2080 making pc restart/monitors go black

Jan 16, 2022
I recently bought an RTX 2080 to put into my pc, and initially had problems running it due to low wattage power supply. I since upgraded my power supply to a brand new Corsair RM850 which should be plenty powerful to power this card, however I put the 2080 in and it gives me purple lines all over the screen so I update my graphics drivers on geforce experience using the express installation which fixes the lines but as soon as I launch a game it makes my monitors go black or my pc restart. I don't think its the card overheating as it runs at 30 degrees from startup. My RTX 2060 in the exact same setup works completely fine. If anyone could give me any insight as to what may fix this I would be very thankful.

Current Specs:
CPU: AMD Ryzen 7 2700X
GPU: Gigabyte trio RTX 2080
RAM; 16GB Corsair Vengeance 3000MHz
Mobo: MSI B450 Tomahawk Pro Carbon AC
Power Supply: Corsair RM850