I have an Evga GeForce 980Ti Hybrid graphics card () and it worked smoothly for the past 3 years.
Starting yesterday, i'm having a weird problem with it. After some minutes of system uptime, the GPU temperature suddenly spikes to 90-91 Celsius degrees in the course of about 1 minute, and the fan ramps up to full speed. This happens quite sudden, there is no significant spike in GPU load to explain this, it happens even while not gaming. Worse, the coolers are unable to bring the temp down to 30-40C as it was before. Even if i restart the computer, the GPU is still not cooled, i have to wait until it cools down naturally. I replaced the thermal paste and cleaned the dust in the graphics board, without success. I don't think the sensors are wrong, because the board feels very hot when i touch it.
I am running the latest GeForce driver (397.31) on Windows 10 Pro x64.
What could cause this? Is it a hardware failure on the graphics board?