I recently built a system for a friend, runs fine, apart from CPU Fan Speed & Temp.
The M/B is ASUS P4PE, CPU P4 2.4ghz, not overclocked.
It the CPU Temp Idle is 42-47 deg C(depending on room temp) and the FAN speed is never goes over 2200 RPM.
At full load it hits 57 deg C and the FAN speed doesnt increase.
Its just a stock HSF that comes with the processor.
Also has 3 system FANs in the case.
I have a GA-8PE667-Ultra, my CPU isnt overclocked either, its temp at idle is 36-41 deg C. Mine is too the stock intel HSF. My CPU Fan Speed is using around 2800-3300 RPM depending on temp.
I believe the ASUS P4PE Fan speed is to slow, it also has Q-FAN and if I set it to maximun speed it doesnt go any faster. I believe the FAN speed is impacting on the CPU Temp, Im thinking about trying another HSF, thought it might be a PSU issue. Has anyone got any ideas?