For how much time did you had the mini M2 Pro?
Are you asking how long I have owned the M2 Pro Mac Mini?
A few weeks now, but have been too busy to try it out as much as I would like.
I am hoping to change that soon.
When you say the temps increased, what do you mean more precisely? Which temperature did you got?
I couldn't remember exactly what the temps were, so I decided to quickly do it again, and take screenshots of the temps.
I logged in, turn every possible graphic setting to the max, and flew around for about 10 minutes. I took a screenshot of the temps and fan speed when I first logged on, and took it again right before I logged off again.
At log on:
GPU at 45c, and idle fan speed. This is before I turned up the graphic settings too, as you can see, the wattage doubles in the next screenshot.
Ten minutes of playtime:
GPU at 95c, and slightly above idle fan speed. Power peaked at 60.76 watts.
If you look at the next two screenshots, you can see how the GPU temps impacted the fan speed, and vice versa:
GPU temps:
Fan speed:
When the GPU hit 96c, the fan speed increased a little, then dropping a little, then another tiny jump up, peaking at 1988rpm. The temps would drop a degree or two, leading to the fan speed to drop a little, which would cause the temps to rise back up to 96c.
I interpret that as meaning the M2 Pro likes to run hot, with the fans staying at idle. When it starts to get too hot for the GPU, it only takes a little bit of extra fan speed to control it.
But to answer your original question about fan noise, I did not hear the M2 Pro Mac Mini at all. It has a lot of ambient noise around it though, there is a pellet wood stove about 20 feet away. So, maybe wait for someone else to give their experience on the noise before making any decisions.