According to what I have been able to find out, you are all wrong. No only is 65 degrees not high, it is in fact the default target temperature set by most 775 socket motherboards. What that means is that if the cpu is below 65 degrees the temperature control unit will automatically reduce the fan speed untill it reaches 65 to reduce noise. This fits perfectly with what I have observed if, as Bokshi says, the cpu is under full load while observed in the bios and affected by power saving mechanisms while in windows.
You might think it sounds like a lot, but thats just an overclocker\s subjective opinion. The processor is rated to run at 65.
It all depends on the exact stepping and model of the CPU. This is an overclocked example of my processor from a a core 2 temperature listing at Tom\s hardware forums.
Example 2: Duo
Tcase = 25c Idle, 60c Load (SpeedFan: CPU or Temp x)
Tjunction average Core = 29c Idle, 67c Load (SpeedFan: Core x)
Ambient = 22c
Chipset = P45
CPU = E8400
CPU Cooler= Arctic Cooling Freezer 7 Pro
Frequency = 4.0 Ghz
Load = Prime95 - Small FFT`s - 10 minutes
Motherboard = Asus P5Q Deluxe
Stepping = C0
Vcore Load = 1.325
http://www.tomshardware.co.uk/forum/221745...mperature-guide
This is from the manual of an artic cooling Freezer 7 I borrowed.
All of our socket 775 coolers come with a pwm controller chip in the motor according to intels specifications, This allows the BIOS to to control the fan precisely. In case the fan is not regulated according to CPU load respective temperature, enter the BIOS. Most socket 775 mainboards offer a target CPU temperature. Set it to 65