happymac.support@gmail.com wrote:

> Thanks for the replies. I got the system custom-built from a computer
> shop. Its been about 7 months since I got it. Since I have a see-
> through case, I checked the inside and the CPU fan. There is barely
> any dust. This is the current status of the fans:
>
> Power Supply Fan: OK
> GPU Fan: OK
> CPU Fan (stock Intel): OK
> Chassis Fan: OK
>
> I felt the air that was coming out of the chassis fan and it was just
> barely more than room temperature (around 25C, I estimated) I think
> its always been this hot, I just noticed it now. Do you think I should
> use a different utility to check the temperature? By the way, I
> checked the motherboard temprature too. No matter what i do, the
> motherboard temperature is always 40C - 42C, and I also checked the
> RPM for the CPU fan, it always varies from 4000RPM - 4150RPM.
>

The system is, overall, running at the top end of acceptable parameters.
The motherboard temperature indicates that there is insufficient airflow
through the computer case and this, in turn, is keeping the CPU temp high.
Just how many chassis fans are there? For a Pentium D, there should be at
least 1 intake fan from the front, 1 intake fan from the side over the
CPU heatsink/fan, 1 exhaust fan out the back plus an exhausting PSU fan
for a total of at least 5 fans. Also, the cable routing benefits the best
airflow.

For comparison's sake, we set up Pentium D 950's in tower cases with 8
fans, resulting in idle temps of 25° C at the motherboard and 45° C at
the CPU. Yes, the Pentium D's do run hot.