Intel Pentium 4

The Intel Pentium 4 is the successor to the Pentium III. It was released in 2000 and unlike the II and III that were directly based on P6, it introduced the NetBurst architecture, designed to favor high clock speeds. The Pentium 4 also brought the SSE2 instruction set, which is a prerequisite for many modern applications and operating systems nowadays.

They were firstly available as 1.3 GHz parts, then parts up to 3.8 GHz were released over several generations, each bringing small improvements and a smaller process. The first one are Willamette Pentium 4s, manufactured with a 180 nm process and existing for Sockets 423 and 478 on Desktop. It was followed by Northwood Pentium 4s made with a 130 nm process for the Socket 478, and then 90 nm Prescott on Socket 478 and 775, the latter being LGA rather than PGA. Cedar Mill is the final generation of Pentium 4s, using a 65 nm process.

The Pentium 4 was in competition with AMD's Athlon XP, then Athlon 64.

Adapters exist to make some Socket 478 Pentium 4s work on Socket 423.

As higher frequencies unsustainably increased heat and power consumption, Intel reverted back to the P6 architure, already during the Pentium 4 era with Pentium Ms that were released in 2003 and more suitable for mobile computers. Later Intel Core Processors are based on the Pentium M rather than Pentium 4. A Dual Core version of the Pentium 4 exists, the Pentium D.

Intel Pentium 4 1.5 GHz Willamette Intel Pentium 4 3.2 GHz Northwood
  • A 1.5 GHz Pentium 4 (SL4SH, Willamette). Bottom. Costa Rica, 2000 Week 39.
  • A 3.2 GHz Pentium 4 (SL7QB, Northwood). Bottom. Philippines, 2005 Week 35.

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