Question about GPU heating

[fanatiqq]

I have a GTX 970 Twin Turbo OC (the one with only 1 cooler like a turbine) When under load (playing games at max settings and other stuff) the cooler ramps up for a few minutes to avoid overheat which is normal, then goes back to normal throttle.
But last night, I quit a game and then turned off my pc right after while the GPU cooler was full throttle. Then I realized I did this other times too.
My question is, did I risk anything? Like the chips not being able to cooldown and then causing issues in the future?
I started to imagine them 'unglueing' from the board because I didn't let the cooler finish the full throttle run and shut the pc down mid-cycle. I'm concerned.

 

[little_me]

Not an issue, You power off, the fan stops, yes but so does the GPU.
No more power, no more heat generated.
GPU's have pretty good overheating protections that drop their clockspeed in case it tries to heat up too much, thus pretty much always capping at 90 to 95C
even with Fan off, the GPU is still connected to the cooling fins like before and will cool through that. Bit slower maybe than with fans on but well enough anyway.

Most GPU's cool down fast anyway, like 10 to 15 seconds for 90 to 60C with fan on and no load so at the point when you turn power off (assuming you don't just do it while ingame) the worries are non-existing anyway.

 

[fanatiqq]

I know a few things about pcs as I build this rig on my own and solved hardware or software related issues in the past
I just want someone who has some expertise to give a good insight and to understand if this thing is only in my head.
I imagine that because i'm not letting the full throttle cooling down process to end which takes a few minutes, it might cause the solder to soften and become gel like and in the long run the chips could 'unglue' from the board itself
Like it happened to older gpus (i had one nvidia like 10 years ago and gave me artifacts and the screen would turn black at full load in games, then took it to a guy for reflow and worked a couple more years after that until a power surge fried it)