Excessively fast fan?

I installed speedfan on my P4 2.4Ghz system and my CPU fan is running at about 2500RPM but on my current PC its running at 27000RPM. Why is there such a huge difference?

Also, it shows temperature in these categories:

Temp 1, Temp 2, Temp 3, Core. What are those areas? 

it says 27000RPM everywhere, in nTune, ASUS PC probe, speedfan

edit: its says 3000 in nTune but ASUS and speedfan says 27k.

Also, whats about those temp zones? 

Temp 1 is the CPU temp(measured on IHS)
Temp 2 is the NB temp
Temp 3 is the  memory temp
Core is the Core temp(either measured from a sensor in the die or between the die & IHS)

it says 27000RPM everywhere, in nTune, ASUS PC probe, speedfan

 

edit: its says 3000 in nTune but ASUS and speedfan says 27k.

 

Also, whats about those temp zones? 

TheDarthvader

Be careful around that fan, 27000rpm could cut off a finger.Baselerd

Well he better not try working on it standing up with it plugged in..thats all I can say about that. 

I think you need big steel cables to avoid it flying away... LOLDirkVDV01

27000 RPMS, thats a freaking Helicopter.  *deep commercial voice*  "the Comput-icopter, perfect for LAN parties and moving around, simply put coordinates in the BIOS, and meet it at your destination. Portable, Reliable, and fast. It's the Comput-icopter. (Computer flies away) PzzzzzzzzzzT!"

SWEEEEEET!