No idea, it doesn't have a backplate - but the thermal tape was on the inside of the card behind screws (I had to take the heatsink off, meaning I can't use the infrared sensor on it unless I'm being a retard and the memory modules are actually on the PCB), but I think my PSU is sound? My entire build is ~4-5 years old except my recently added 500GB 850Evo, which is doing fine. I can overclock and overvolt my CPU to 4.5GHz (from 3.3GHz) without much of a significant temperature increase, so I don't think it's my PSU. If I underclock my GPU to the lowest possible (410MHz core, 1000MHz memory) then it takes longer to artifact. If I set the fan speed to 100% and leave the clock stock then it artifacts, but it takes quite a bit of stress for it to happen, which makes me believe the memory isn't being cooled properly? Sorry for the massive text, I've just had this problem for ages and it's annoying.