First released on November 20, 2000, the Pentium 4 is a line of computer processors developed and manufactured by Intel. They were single core processors originally based on an architecture codenamed Willamette and were used in desktop and laptop computers until the late 2000s. These processors were the successor to the Pentium III line; their development began about two years earlier, when the Pentium II was Intel's flagship consumer processor.
The first Pentium 4 processor cores were capable of speeds from 1. 3 to 2 GHz. They utilized a 180 nm fabrication process and was the first CPU to use the NetBurst microarchitecture, employing Intel's Hyper Pipelined and Rapid Execution Engine technologies. To use this processor, a motherboard was required to have a Socket 423 CPU socket. Future versions of the Pentium 4 processor included the Northwood and Prescott, using different CPU sockets like Socket 478 and LGA 775.
The highest speed Pentium 4 was a Prescott version, clocking in at 3.8 GHz. Laptop versions of the Pentium 4 processor were developed as well, called the Pentium 4-M and Mobile Pentium 4. These processors used less wattage when running and generated less heat, both of which were necessities for use in a laptop. Hyper-threading technology was also introduced with the Pentium 4 processor.