idk the fan's pretty decent compared to my other machines. The HP I was daily driving before I got my T480s not only sounds like it's trying to take off, but the fan is constantly running (I've tried turning off this feature in the UEFI, to no avail).
I have a T480. Apparently they fixed the fan in the S. I have 16gb ram and 2tb storage and yet it can't handle geoguessr in my browser. The fan likes to get real loud and temp gets hot. Sometimes decides to do that when im not dojng anything on it. Occasionally it'll randomly refuse to boot because of "fan error." Usually going in and jiggling the fan internally works but it's annoying to deal with. Tried reapplying thermal paste but that didn't make much of a difference. Other than that it's been a good laptop.
No support for the nVidia graphics though. I was hoping for that for my T580 to be able to raise the stupid thermal limits but I seem to be at the mercy of nvidia.
Do you really want to increase the temperature of your GPU that much? CPUs are more than happy to run at 99c all day, but GPU aren't so much, especially the bigger ones. The MX150 is pretty small so it should handle it well, but still.