I have a stock GTX 1080 which I've had since 2016, I'm convinced it's on the way out as I have to significantly underclock it by -300MHZ in MSI afterburner in order to not get artefacting and crashing problems on pretty much any game or 3DMARK. The supporting cast for the PC is an i7 6700k, 32gb RAM and a 750w PSU, all of the components are reading usual temps apart from the GPU which I feel is really burning up. Is the GPU the obvious problem or is there likely to be something else causing this in the system? I can still run any game I want just fine but the significant underclock and high 80 degree temps are pretty concerning in my eyes and I'm happy to upgrade to a more modern card if that would be the best course of action for the PC overall, any suggestions for a card that wouldn't break the bank, has more fans on than my stock 1080 and performs better would be great.