I would say, set your hysteresis temp to a little below your normal operating temperature, and it should fix your alarm. 39C is quite good for an AMD XP 1700+. Mine with a copper fan-fin heatsink, 3 case fans, power supply fan, system fan, and GPU fan runs at 43C. (I just burned out my 1400 by running without a heatsink while defeating the CPU-Fan safety check... stupid me - I wouldn't let the BIOS save me. It was pretty spectacular though: The seal on the CPU blew, molten sealent spewed out the side and it started smoking, all within 10 seconds of powering up!)