Question How to Fix Black Screen when Gaming?

[Firiwayer]

Hello, today i want to know how to not get a black screen when gaming. Everytime I run a game on my computer after 5-15 minutes my computer shows a black screen but the PC is still running! And I have to power it off. When im not gaming i don't get a black screen. No, its not a virus cuz i even had it when i still had windows 8.1 as my OS. I upgraded to windows 10 and still get it. I think I have a problem with my cooler.

 

[Firiwayer]

Alright, I ran sfc/ scannow and it didn't work. I can now confirm that the problem is with my graphics card or cooler. I'm thinking on buying a new graphics card, but most of the graphics cards on the website I'm using were manufactured by Gigabyte.
I have a NVIDIA graphics card. What happens if I buy the gigabyte graphics card?