Help!! AMD X4 630 CPU fan suddenly running at 6/6.6k RPM continuously

[Tech.Masti]

my 2 month old AMD X4 630 cpu fan suddenly running at 6600/6607 speed without any reason, that time i was playing age of mythology, this does not happen in last 2 months... when i stop playing fan speed does not decreased.... even when i doing nothing , still got 6400/6600 RPM speed, and making a lot noise, i tried to clean cpu fan, but no result... same thing....what to do.... NEED HELP PLEASE.....
specification....
MSI 785G-E53 , CORSAIR 2GB DDR3, WD 500GB, SAMSUNG DVDRW, iball cabinet with SMPS

[asingh]

^^
Reset the BIOS once.

[Sam]

update BIOS to latest version. problem should solve.

[Tech.Masti]

thanks for response guys...

@asighi already reset bios but no improvement....

@Sam.Shab.... i never updated bios before.... isn't it tooo risky?.... heard somewhere... can you give me some good link from where i can get some solid idea....thanks

[asingh]

^^
Try the MSI forums. If you cannot get it there, the BIOS update method, let me know, will help out.