Windows XP: The Relationship Between Power Scheme And PowerNow
Contents
- 1. Mobile Athlon XP And KT266A: A Superior Combination?
- 2. Vaio NVR-23: From All Sides
- 3. Vaio NVR-23: From All Sides, Continued
- 4. PowerNow = Always As Much Power As Necessary + Power Consumption As Low As Possible
- 5. Windows XP: The Relationship Between Power Scheme And PowerNow
- 6. Nvidia's PowerMizer: PowerNow For The GPU
- 7. Test Setup: Sony NVR-23
- 8. Benchmarks Under Windows XP
- 9. Synthetic Benchmarks
- 10. Multimedia Performance: PC Mark 2002
- 11. Application Benchmarks
- 12. 3D Performance: The Latest Drivers From The Manufacturer? Hardly!
- 13. Direct-3D Performance: 3D Mark2001 SE
- 14. Influence Of PowerMizer On 3D Performance
- 15. Open-GL Game Performance At Different PowerMizer Settings
- 16. Influence Of PowerMizer On The Battery Life
5. Windows XP: The Relationship Between Power Scheme And PowerNow
If you are using Windows XP, you hardly need to worry about CPU power management, because PowerNow works transparently in the background. However, you should be aware of the effects that the power scheme settings have on the power management of the processor.
This is where the settings are adjusted for the lowest possible power consumption.
The various schemes provide the following options for controlling the performance and, thus, the power consumption of the mobile Athlon XP:
| Windows XP Power Schemes | AC Power (Frequency Example mobile Athlon XP 1800+) | Battery DC (Frequency Example mobile Athlon XP 1800+) |
|---|---|---|
| Home/Office Desktop | None (1530 MHz Always) | Adaptive (399 <-...->1530 MHz) |
| Portable /Laptop | Adaptive (399 <-...->1530 MHz) | Adaptive (399 <-...->1530 MHz) |
| Presentation | Adaptive (399 <-...->1530 MHz) | Degrade (399 MHz) |
| Always On | None (1530 MHz Always) | None (1530 MHz Always) |
| Minimal Power Management | Adaptive (399 <-...->1530 MHz) | Adaptive (399 <-...->1530 MHz) |
| Maximum Battery | Adaptive (399 <-...->1530 MHz) | Degrade (399 MHz) |
As the table shows, the portable/ laptop power scheme is the optimum choice. This setting ensures an optimum balance of processor performance and power consumption in both battery and AC modes.
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