without dissambling and see how memory cooled hard to say.some vendors do very bad memory cooling, some memory on air only half memory cooled like that. besides you can dissamble it without warranty lost but need to be very careful here on youtube but it is russian but you can see how you make it 
https://www.youtube.com/watch?v=82sf5Lk2lqA&t=1301s
hot gun the carefully take sticker.
https://www.youtube.com/watch?v=82sf5Lk2lqA&t=1301s
hot gun the carefully take sticker.
He added sensors on memory to see the temperature, nvidia doesn't, he does, smart guy.
There is this video of red mining panda on a 3080 gigabyte, he added thermal pads on the back and it worked without any problems, I guess thermal pads only on the front is not good for gddrx6.
https://www.youtube.com/watch?v=cDau0RyfJ0I
If red mining panda had put a sensor before those thermal pads then we could see the temperature the gpu was throttling and the temperature after he had placed the thermal pads.