My current fan speed is 50%. I am using Full tower chasis Tharmaltake Xaser VI. I have not recognized my room temp. properly yet. But my room gets too hot during summer season. Previously, I owned a low tower chasis which caused overheating issue constantly. So I replaced it with Tharmaltake Full tower.
Now my system gets frozen if I use it more than 6 hours.
From BIOS, CPU Temp. 30 to 33* C and Overall temp is 40 to 41* C. From Vista 64 BIT sidebar CPU Temp. is 33 to 40*C