GPU fan speed won't change after closing Cgminer

[gilad215]

 

Hey guys. running my new R290 with cgminer 3.7.2 on windows 8.1
the mining procedure works great but after i close cgminer to return to my work the fan speed of the gpu stays high on 70% like i set on my scrypt.
why does it happen? even when i try to change the speed through CATALYST it won't change! and its LOUD! this didn't happen with my 280x that i had in the same system 2 days ago!

any help?

thank you