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Water Cooling Is Recommended For 4.0 GHz

A 4.1 GHz Dual Core at $130 - Can it be True?
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3.8 GHz is all well and good, but 4.0 GHz lets you tackle and beat the current Pentium Extreme Edition 965 (even though it's not yet available at retail outlets). To this end, we boosted the FSB clock rate to a full 200 MHz.

Overclocking by 50 percent shows this 2.66 GHz processor booting at slightly over 4 GHz

To keep the system stable at a 50 percent overclocking level, we had to increase the core CPU voltage yet again. We took the same incremental approach described in the preceding section. Finally, when the voltage was increased by 0.2875 V, the system continued to be stable at 4 GHz, even at maximum load!

At 4014 MHz the Pentium D 805 remains absolutely stable and is thus overclocked by about 50 percent.

Although the Pentium D 805 offers only a 1 MB L2 cache, its CPU clock is also 276 MHz faster than the top-of-the-line Pentium EE 965 (equipped with 2 MB L2 cache); this enables the 805 to outperform the pricier chip.

CPU Rightmark also shows a CPU clock rate of 4 GHz.

This is where the Zalman cooler begins to show signs of stress. In fact, its maximum fan rotation speed isn't enough to handle the terrific levels of heat produced; the CPU gets too hot, and begins to throttle back its speed.

The violet line clearly shows that when loaded, the CPU begins to throttle back through the intervention of Thermal Monitor 2. Though this prevents the CPU from burning up, it also slows things down.
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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