It would be great if you change the heatsink (Processor Fan), it is also great if you install the MotherBoard Temporature Tools (Software) Like
Active Monitor from Intal Corporation. or can see the status of processor and motherboard temporature through BIOS Setup.
I have a mother baord D915 Series board, it is showing temporatur more and 80+ C and FAN Speed is not more than 2500 RPM (Round per minutues)
which is not good for mother baord and toughing finger the motherbard, it is too hot.