| To identify a reason for failure means identifying damage part(s) on that card. Most replies would not even know where to start. Most just assume damage must be surge damage due to advertising, hearsay, and wild speculation.|
Most electronic failures are due to manufacturing defects. Such defects (ie bulging electrolytic capacitors) can occur years later.
To be surge damaged, an electric current must enter that card on one path (ie video display) and exit on another path (ie motherboard). If both paths do not exist, then no surge current exists. Damage parts are only in that path. All other parts would be unharmed. Then one could assume damage was from a surge.
If a surge damaged a graphics card, then other appliances are also surge damage. Is a dishwasher, digital clocks, TV, or bathroom GFCI also damaged? If not, then a surge is doubtful.
Most failures are due to manufacturing defects.
What can sometimes make surge damage easier? A power strip protector. That protector can sometimes give a surge even more paths to find earth destructively via the computer. Can compromise superior protection already inside appliances. Informed consumers instead and only earth one ‘whole house’ protector.