Odd CPU Temps

[Oddsk8er]

I have a Coolermast JET 4 hsf on my P4 2.8c w/HT processor. I have applied the JET 4 with Arctic Silver 5. The past 3 or 4 days, the temperature (As shown by the ASUS PC Probe that came with my ASUS P4P800SE) has been around 30-34 C idle, and 40-45 C on full load.

This morning I turn on my computer and I have touched nothing on the hardware side of the computer, and I take a look at the PC Probe and the temperature of the cpu is already at 40 C. I figure it's just that my CPU fan is just turn down a little. It is already at max. Why is my CPU running hotter all of the sudden?

 

[Oddsk8er]

Oh yeah, and I also have a feeling some of these temperatures may be off. I have a temperature gauge/readout that came with my case. That shows the cpu at 26-30 C idle with the HSF at max. Although in my bios the temperature says it is at 45 c. But the PC Probe will say (or used to) 30-35 C.