So normally, when my PC is working under Normal Operating conditions, the GPU sits at a comfortable 29-31 degrees Celcius, and is not running at all. But it seems that if I leave it to its own devices, like if I get up to watch a TV show/movie and leave the PC idle, for reasons unknown to me the GPU will kick in to high gear. It will warm up to 60 degrees C, which will then trigger the GPU fan to activate and cool it off.
I hear the GPU fan kicking in, I go to investigate, and as soon as I bring my PC out of idle state, the GPU suddenly shuts off and starts cooling down again. It's like the GPU is doing something when I'm not looking, but as soon as I catch it, it stops misbehaving, like a naughty toddler nearly getting caught with his hands in the cookie jar.
Any ideas why this could be happening?