HELP, M15X fan noise

Hi, 

I am now using M15X with CPU-740, Graphic Card-460M, and SSD.

I can clearly hear the fan noise when I am not playing games. Usually, the noise is periodic, like every 10s or 20s there will be a big fan noise. Even after I just started the computer and log into win7, it will be noisy like this for a while.

Besides, this is when I am not running in the stealth mode. Cause I don't want to change the mode in often.

I just what know it anyone else has the same issue.

***, this noise comes back again.....

I will try the stealth mode now.

Oh, another question, does anyone know how to check the temperature in win7? I mean not using a third party software.

PS: temperatures when not play games (not stealth)

CPU-

CORE1: 125F

CORE2: 122F

CORE3: 135F

CORE4: 124F

GPU: 108F

Thanks a lot