
As the AMD tool PSTCheck is not available, we have to look elsewhere. An ideal choice is CrystalCPUID, a freeware tool that allows you to set multipliers.
With this tool, you set the smallest and largest multiplier. You also need to enter details such as which CPU load (or "threshold") triggers the next higher/lower multiplier. If only one clock speed is required, the same multiplier is used for both the largest and the smallest value.

The freeware tool CrystalCPUID V3.5 to change the multiplier under Windows
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Summary
- The AthlonXP At 4.5 Watts
- Applications For Quiet Computers
- An AthlonXP Becomes A Mobile AthlonXP
- Transformation: An AthlonXP Becomes An AthlonXP-M
- We're Off: Building Bridges
- We're Off: Building Bridges, Continued
- The Trick: Changing The Multiplier On The Fly
- Software For Multiplier Adjustment
- Chipset Register For Changing The Multiplier
- System Clock: At Least 100 MHz
- Core Voltage: The Lower The Better
- As A Point Of Comparison: Intel Pentium 4
- Lower Speeds Just By Halving The FSB Clock
- Test System
- CPU Coolers For The AthlonXP
- CPU Coolers For The P4
- Test Results
- Power Loss
- Power Consumption
- Benchmark Results
- Benchmark Results, Continued
- Benchmark Results, Continued
- Benchmark Results, Continued
- Benchmark Results, Continued
- Conclusion
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