My P4P800-E Deluxe w/Zalman 7000 fan:
Idle:
CPU: 33C
MB: 36C
Stress -- Prime95 (max heat test) for 10 minutes:
CPU: 50C
MB: 38C
The Prime95 max heat test makes the temps go up higher than any applications
I use. Also the fans go to max speed when Prime95 is running. The moment I
exit Prime95, the whole thing "calms down." In particular, the CPU temp
drops immediately. (I don't know what Prime95 does, but it's impressive to
watch the results on the temp gauges.)
When I was researching my new system, I was deciding between the P4C800-E
Deluxe and the P4P800-E Deluxe. They are very similar. It seemed that the
P4Cx was a better choice for heavy-duty networking, but that the P4Px was a
good choice for a home/office machine with lots of speed and power. (I'm
sure others can give you a better explanation of the differences.) I got
the P4/3.0C and 2GB Mushkin RAM and the machine flies! I use the machine
for Photoshop and operations that took up to 30 seconds or more on my old P3
machine now take only a few seconds. Amazing.
John