See if you can make such a change in BIOS Setup for the fan. 146 fan speed 135 flash BIOS 132 I/O address 141 intrusion detection/notification 135 IRQ 141 jumper 139 LoJack 135 memory address 141 MSI 142 MSI-X. For this you may be able to re-adjust the fan control system to increase the minimum speed it is told to run at the lowest temperatures. OR, the fan control system has been set to a minimum speed (for lowest temperatures and workload) that really is too slow, allowing the fan to stall. IF the fan is old and worn, it may stall because of bearing friction even if the speed control signal sent to it is what would have been adequate when the fan was new. If that is too slow, the fan will stall again and the cycle repeats. But if the fan does re-start, then its speed signals would be set back to what it was before. If it does not, then you would get a fan failure warning screen and possibly a system shut-down to prevent overheating.
If that happens, the first reaction of your system would be to change the fan speed control signal to call for full speed to ensure it DOES re-start. The NORMAL operation of a fan involves monitoring the fan speed signal for failure - that is, it stops turning and sending a speed signal.
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