Keeping Cool When Power Consumed Tops 150 Watts at 4.1 GHz, Continued

12:26 - Wednesday 10 May 2006 by Bert Töpelt
Source: Tom's Hardware – Keywords: dual, 41, ghz, cores, uk

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

Keeping Cool When Power Consumed Tops 150 Watts at 4.1 GHz, Continued

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Graphical representation of linear temperature as power consumption increases

From the same datasheet, you can also observe that this CPU can accept input voltages ranging from 1.2 to 1.4 V. These voltage levels, however, can actually vary within the same series of CPUs; actual values for the CPU in hand are stored in ROM on the chip, and aren't specified on the packaging or in the Spec numbers.

No exact information can be found on the box: only the maximum input voltage of 1.4 V is printed.

The lower the standard voltage of a CPU, the lower its resulting power consumption and cooling requirements.

It's necessary to jump a few hurdles to access the CPU registers and read the actual voltage levels they contain.

A lower CPU voltage level generally indicates a higher-quality CPU. That's because the transistors require less voltage to change states, which also substantially raises the chances of attaining high clock rates.


The CPU we purchased for testing shows an internal voltage setting of 1.3375 V.

The voltage level you see on your Pentium D 805 must be the same or lower for you to attain the same overclocking result we achieved or do better.


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