Even when setting the values to 0 the fans appear to be running at 100. Trying through the BIOS doesn't seem to influence the speed of the System or Case Fans. Learn how to reduce PC fan noise, from controls to cleaning dust. 1 Hello, I was wondering what the best method was for controlling system fans on the MSI Pro Z690-A DDR4 ATX. See if you can make such a change in BIOS Setup for the fan. Dell latitude laptop wont turn on fan starts then stops. 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. Apply the following fix if the fan speed control feature is still disabled. In the drop-down menu next to Predefined fan speed curve, select Custom.

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. Check the box for Enable user-defined software automatic fan control. 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.

Msi laptop control fan speed