Problems with overheating/non-sufficient cooling on my DG965

Hi people,

First of all, I'm sorry if this is the wrong forum area, but I couldn't really tell in which should I post my problem.

Ok look, ever since I built my computer in february I've been having problems with low RPMs and CPU temperature.

My motherboard model is DG965SS.

All the time, my processor (Intel Core 2 Duo E6400) is running at 56-60 degrees Celsius while my stock fan is at 940-950 RPM and I see no way of controlling the Fan Speed in the Bios. I've also tried using speedfan to change the fan speed, but it doesn't recognize my CPU fan at all. (Only the 2 cores and my other two HDDs)

If anyone could help me out by telling me what to do in order to lower my temperature and making my RPM bigger I would appreciate it lots!

Thank you in advance
~Trab