Slow fan in computer processor

[tuskar]

what is a cause of slow fan in processor is there anyway to make fan speed is to make fast...when i often my pc the fan processor is to low speed after 10 or 15 min its to fast what is the cause of that..

 

[nna2]

if your cpu is recent, it probaly has a PWM controller (idk if its relevant)
as your cpu cools off, the fan contoller in the bios will slow down the fan because theres no need to run it that fast (quieter, will last longer)

if you go into your bios settings, usualy delete or f1 while displaying the startup picture/posting, and search for somthing to do with the fans