AMD Athlon64 supports a technology called Cool N’ Quiet which, when enabled, will help your PC run (suprise!) cooler and quiter. Basically, what this is is a monitoring system which monitors CPU load and automatically adjusts the CPU fan speed and power consumptions of the processor to suit the current load. In order to use this, you, of course, must be running the Athlon64 processor from AMD. You also need to be running a CPU fan which supports it (the fan included with retail-boxes Athlon64’s does), a motherboard with BIOS which supports it, as well as software drivers. If you meet these criteria, then go into your PC’s BIOS and enable Cool N’ Quiet. Then, you will need to install the drivers from your motherboard’s driver CD. When all is done, you should notice your processor running a new degrees cooler and the fan will not always work as hard.