What is the difference between pentium d&pentium 4?

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When the Pentium D debuted in 2005, the Pentium 4 held Intel's speed record. But the Pentium D, albeit slower, had the benefit of being two processors in one.

Speed

The first Pentium D had a clock speed of 2.8 GHz (billion cycles per second). The chip hit the shelves on the same day as the fastest Pentium 4, at 3.8 GHz. Still, the P4 did not enjoy a decisive performance advantage over the PD because of the latter's dual cores.

Cores

The core is the part of the processor where the actual calculations take place. The P4 uses one core. The PD has two. For this reason, the PD performs on par with the faster P4 when running "multi-threaded" applications, whose operations the CPU is meant to divide and process separately.

Power Consumption

According to TechReport.com, the PD is more energy efficient than the P4, at times outperforming it without requiring more power.

Cost

Despite being a close match in performance, the two processors were worlds apart in terms of cost. At the time of their release, the P4 cost $851, compared to the PD at $241.

Considerations

As of 2010, all high-end processors contain multiple cores, a trend aided by performance gains of models like the early Pentium D.

Source:

AnandTech: Intel's Pentium 4 670

The Tech Report: Intel's Pentium D 820 and Pentium 4 670 Processors

More Information:

Bit-Tech: Intel Pentium 4 670 & Pentium D 820

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What is the difference between pentium d&pentium 4?

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