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Power Consumption Levels Top 200 W, Continued

A 4.1 GHz Dual Core at $130 - Can it be True?
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If you look at the idle mode behaviour of this test system when compared to other processors, the power consumption doesn't look bad at all. Compared to a Pentium D 950 running at 3.4 GHz, for example, this system consumes only 40 W more when overclocked to 4.1 GHz. At heavy load, power consumption for the Pentium D 950 climbs to only 101 W. When you take into account the 700 MHz higher clock rate and the low cost of the CPU, power costs for the Pentium D 805 don't seem so bad.

To determine if we needed a new power supply for our test system, we also loaded the CPU in tandem with the graphics card. This produced a measurement of total power consumption of 512 watts at the wall socket! This might sound like a lot, but also requires that you factor in the efficiency rating of the power supply itself. Most PSUs have efficiency ratings of somewhere between 75 and 80 percent, which means that the components in our test system are consuming 384 W of power. Thus, those who have a 500 Watt power supply in their PCs can overclock this CPU without a second thought.

Those who may be concerned about the voltage regulators on their motherboards should purchase a board with an 8-phase regulator. We recommend the Asus workstation motherboard P5WD2-WS Premium for that reason (as we write this story, it's not yet available in North America, but it should be some time this summer).

With an 8-phase regulator, the Asus P5WD2-WS motherboard is designed to meet high power demand.
Summary
  1. A Budget CPU At Top Speeds
  2. A Budget CPU At Top Speeds, Continued
  3. Inside the Pentium D 805
  4. The Secret Of The Multiplier
  5. 133 MHz FSB: Perfect For Overclocking
  6. How Is Breaking The 4 GHz Barrier Possible?
  7. How Is Breaking The 4 GHz Barrier Possible? Continued
  8. How Is Breaking The 4 GHz Barrier Possible? Continued
  9. Three Theories Where The Customer Comes Out Ahead
  10. Which Memory Clock Speed Is Most Suitable?
  11. The Right Chipset
  12. Keeping Cool When Power Consumed Tops 150 Watts at 4.1 GHz
  13. Keeping Cool When Power Consumed Tops 150 Watts at 4.1 GHz, Continued
  14. Power Consumption Levels Top 200 W
  15. Power Consumption Levels Top 200 W, Continued
  16. Energy Saving Functions Lack C1E
  17. Risk-free Overclocking, Including Heat Protection
  18. Ready For The 64 Bit Future
  19. Tom's Hardware Guides Overclocking Diary
  20. 3.33 GHz Remains Stable At Standard Voltage Levels
  21. 3.33 GHz Remains Stable At Standard Voltage Levels, Continued
  22. Trouble Free Operation At 3.60 GHz
  23. At 3.8 GHz Some Minor Voltage Increases Become Necessary
  24. Water Cooling Is Recommended For 4.0 GHz
  25. Water Cooling Is Recommended For 4.0 GHz, Continued
  26. Overclocking To 4.10 GHz Boosts Basic Clock Speed By 54 Percent
  27. Overclocking To 4.10 GHz Boosts Basic Clock Speed By 54 Percent, Continued
  28. Will The System Boot At 4.3 GHz?
  29. Benchmark Results Show Performance Increases Of Up To 54 Percent
  30. 3D, Continued
  31. 3D, Continued
  32. Video Editing / Video Encoding
  33. Video, Continued
  34. Video, Continued
  35. Audio Encoding
  36. Office Applications
  37. Office Applications, Continued
  38. Parallel Applications - Multitasking
  39. Synthetic Benchmarks
  40. Synthetic Benchmarks, Continued
  41. Synthetic Benchmarks, Continued
  42. Synthetic Benchmarks, Continued
  43. Summary Overview: Who's The Winner?
  44. Conclusion: The 4.1 GHz Dual Core Delivers Peak Performance For Pocket Change
  45. Conclusion, Continued
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