I hated this design when it came out.
The '?' shows a dead spot, not to be able to cool enough. Plus, in those lanes around it, the air escape sucks and you might have dust having a playing field there. What to learn here is yes, the GPU chip might be fine in temps, but not the VRM's that is around the graphics-chip. That is behind that blind-spot.
What also is possible, that the strips that are on the VRMs is moved as in meaning that the small things overheat.
These card is a pain in the ass to open, unmount it and I recommend you to find Youtube video's of how they are able to do it. Only, if you are not having that RMA claim.
Take it out, take a good look with a flashlight.
Or do you have this one? :