Intel Pentium 4, Socket 423/478

Pentium III ◄ Pentium 4 (423/478) ► Pentium 4 (775)


Intel Pentium 4 Willamette © Intel
Intel Pentium 4 Willamette © Intel

Pentium 4 is a line of single-core desktop and laptop CPUs introduced by Intel on November 20, 2000 and shipped through August 8, 2008. They had a 7th-generation x86 microarchitecture, called NetBurst, which was the company's first all-new design since the introduction of the P6 microarchitecture of the Pentium Pro CPUs in 1995. NetBurst differed from P6 (Pentium III, II, etc.) by featuring a very deep instruction pipeline to achieve very high clock speeds. Intel claimed that NetBurst would allow clock speeds of up to 10 GHz; however, severe problems with heat dissipation (especially with the Prescott Pentium 4) limited CPU clock speeds to a much lower 3.8 GHz.

 

In 2004, the initial 32-bit x86 instruction set of the Pentium 4 microprocessors was extended by the 64-bit x86-64 set.

 

The Pentium 4 Willamette

Willamette, the project codename for the first NetBurst microarchitecture implementation, experienced long delays in the completion of its design process. On November 20, 2000, Intel released the Willamette-based Pentium 4 clocked at 1.4 and 1.5 GHz. Most industry experts regarded the initial release as a stopgap product, introduced before it was truly ready. According to these experts, the Pentium 4 was released because the competing Thunderbird-based AMD Athlon was outperforming the aging Pentium III, and further improvements to the Pentium III were not yet possible. This Pentium 4 was produced using a 180 nm process and initially used Socket 423 (also called socket W, for "Willamette"), with later revisions moving to Socket 478 (socket N, for "Northwood").

Intel Pentium 4 1.3 GHz

1.3 GHz (Socket 423)
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Intel Pentium 4 1.4 GHz

1.4 GHz (Socket 423)
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Intel Pentium 4 1.5 GHz

w/o IHS:


1.5 GHz (Socket 423)
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1.5 GHz (Socket 478)
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Intel Pentium 4 1.6 GHz

CPU-Z:


1.6 GHz (Socket 478)
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Intel Pentium 4 1.7 GHz

1.7 GHz (Socket 423)
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1.7 GHz (Socket 478)
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Intel Pentium 4 1.8 GHz

CPU-Z:


1.8 GHz (Socket 478)
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The Pentium 4 Northwood

In January 2002 Intel released Pentium 4s with a new core code named "Northwood" at speeds of 1.6 GHz to 2.2 GHz. Northwood combined an increase in the L2 cache size from 256 KB to 512 KB (increasing the transistor count from 42 million to 55 million) with a transition to a new 130 nm fabrication process.

On April 14, 2003, Intel officially launched the new Pentium 4 HT processor. This was meant to help the Pentium 4 better compete with AMD's Opteron line of processors.

Intel Pentium 4 1.8A GHz

CPU-Z:


1.8A GHz
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Intel Pentium 4 2A GHz

w/o IHS:


2A GHz
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Intel Pentium 4 2.26 GHz

w/o IHS:


2.26 GHz
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Intel Pentium 4 2.4 GHz

CPU-Z:


2.4 GHz
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Intel Pentium 4 2.53 GHz

Kindly donated by Pauli Rautakorpi.

2.53 GHz
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Intel Pentium 4 2.66 GHz

CPU-Z:


2.66 GHz
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Intel Pentium 4 2.8 GHz

2.8 GHz
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Intel Pentium 4 HT 2.6 GHz

2.6 GHz
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Intel Pentium 4 HT 3.0 GHz

3.0 GHz
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The Pentium 4 Prescott

On February 1, 2004, Intel introduced a new core codenamed "Prescott". The core used the 90 nm process for the first time. The "Prescott" Pentium 4 contains 125 million transistors and has a die area of 112 mm^2. Originally, Intel released two Prescott lines: the E-series, with an 800 MT/s FSB and Hyper-Threading support, and the low-end A-series, with a 533 MT/s FSB and Hyper-Threading disabled. Intel eventually added XD Bit (eXecute Disable) and Intel 64 functionality to Prescott.

Intel Pentium 4 2.4 GHz

2.4 GHz (Socket 478)
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Intel Pentium 4 2.8 GHz

2.8 GHz (Socket 478)
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Intel Pentium 4 HT 530 (3.0 GHz)

3.0 GHz (Socket 478)
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Intel Pentium 4 HT 540 (3.2 GHz)

3.2 GHz (Socket 478)
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The Mobile Pentium 4-M

Intel Mobile Pentium 4-M 1.8 GHz

1.8 GHz
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