Cpu fan

Hi, my compaq presario motherboard took a crap and i replaced it with a asrock p4i65g and everything works great except cpu fan is running at 5000 rpm is this normal . its a 478 2.5 intel celeron processor with stock heatsink, temps are fine also , around 35

download and install speedfan.
http://www.almico.com/speedfan432.exe
with it you can monitor temps and voltages, but also control the speed of your fans