Yeahp, the fans are working idle is at 49°C i dont know why its happen this :S my PC spec:
Phenom II x4 945 @ 3.5ghz+ cooler master hyper 212 plus
sabertooth 990fx
8GB ram (2x4gb) kingstone hyperx 1600mhz
Evga GTX 460 SC 1gb
caste cooler master elite+front fan+rear fan