Question: how do you know your graphics card is dying?
Answer: Computer Crashes. Graphics cards that have gone rogue can cause a PC to crash. ... 
Artifacting. When something is going wrong with the graphics card, you may notice this via bizarre visuals onscreen. ... 
Loud Fan Sounds. ... 
Driver Crashes. ... 
Black Screens. ... 
Change the Drivers. ... 
Cool It Down. ... 
Make Sure It's Properly Seated.