922Haf Fan Spins full Speed

[vinaylahoti]

I've 922Haf Cabinet.
The Top 200mm fan spins faster when ever i switch on my CPU after 2-3 secs it gets back to nrml speed.
i mean to say as soon as i switch on my CPU the fan rotates faster and i can hear noise of that fan after few sec it slows down and rotates quietly.
Is that a problem ? how can i control it ?

 

[das_stig]

Thats normal, a lot of fans start off on full speed and then the bios kicks in and controls the rpm.

Some bios's have the option to tune the fans for silent\performance\optimal modes.