I have a new Samsung PC, model NP350V5C-S06FR.
It came with Win8, but I removed it and replaced with Ubuntu 13.04 & Windows 7.
In Win7, the main fan does not turn on (i can't feel any air), unless CPU temperature reaches 90°C. In about 60 seconds, the CPU goes down from 90°C to 60°C.
In Ubuntu, the fan seems to work normally. In BIOS, it also runs at max speed.
There are no BIOS settings for fan speed. Speedfan and similar software do not find my fan.
I'm pretty sure all the latest drivers are installed.
Any ideas ?