I'd think the most common failure point on a GFX card is the cooling fan, so if they have been run continuously for years the bearings on the fan are probably g

I'd think the most common failure point on a GFX card is the cooling fan, so if they have been run continuously for years the bearings on the fan are probably getting pretty worn out. Hopefully manufacturers aren't still gluing the fans on the boards. I lost a couple of GPUs thanks to that, turning what should be an easy fix into a replace the whole damn card situation.