Hi i have a PC with an Asus motherboard (forgot which model specifically but it's pretty recent). I have an AMD Athlon 64 3800+ X2. I just turned on Q-fan control in the Bios cuz i cannot concentrate with the fans blaring at full speed. I'm using SpeedFan to measure the CPU temperature, and my idle temperature hovers around 27 degrees when the CPU is throttled to 1Ghz and hovers around 32 degreess when CPU is running at the full 2 ghz. The temperature rises to around 45 to 47 degrees when running the CPU at the full 2ghz on full load for approximately 15 minutes. Is this safe? Also i can BARELY hear the fans increasing in speed under full load, although it is audible if you pay close attention, is this normal?

Sounds reasonable to me. I'm running my rig at about that temp and the overclock utility shows the temp to be in the "green".

Those temps are high but not unacceptable. Most CPUs can run VERY hot and not become unstable (Of course that is not an optimal solution).

As an alternative if you are too leery of the temperatures, try putting one of these (http://www.zalman.co.kr/eng/product/view.asp?idx=70&code=017) in-line of the fan and set the fan speed to one that is acceptable but not too low.

The Zalman Fanmates are practically a must-have for those of us that have signifigant-others that are anti-noise.

Seems pretty high. My X2 4200+, same series of chip never gets above 33C. That's just with the stock amd fan. I have it installed in an antec sonata II case with a single case fan @ 1200 rpm.

It's very quiet, I can barely tell it's on unless I get real close.

Are you using cool-and-quiet? that will make it run cooler too... although I still don't see those kind of temps, even when it's disabled.

yes i am using cool and quiet, i average about 26 degrees in idle mode and anywhere between 40-47 degrees celsius on full load.

Seems real odd that it jumps that much under load. Mine's about the same at idle but to jump that high under load seems odd to me... Mine only jumps a few degrees under load.

Still probably not a big deal, I don't think I'd get real concerned until I saw temps in the 60's

your fine.

I've built over 1000 pcs and ever one has a different temp reading.

It's never consistant.

As long as the pc is running fine, you're ok. The cpu has built in thermal protection that will shut down your system incase of over heating.

Check your thermal paste and reapply a fresh coat - Use artic silver 5 or another premium brand.

It's not really a jump. The temperature rises slowly when on full load, it takes about 15-20 minutes on full load to reach 45-47 degrees.

i run mine oced to 2.5ghz and max at 50C. Perfectly fine. The best way to find absolute max temperatures is with a program called "orthos prime". It calculates very large prime numbers and stresses cpus immensively (dual core operation too). I've never seen a game making my cpu reach 50C tho, only this. run the Large, In-Place FFTs for highest temperature. Check temps with everest home edition