Intel Pentium 4 Willamette die shotIntel released the Pentium 4 on the 20th of November in 2000 built of 42 million transistors on a 180nm process. On the 21st of May in 2001, Intel released NetBurst-based Xeons clocked at up to 1.7GHz as well as the Intel 860 chipset to accompany them. In March of 2002, Intel released the Xeon MP. In November of 2002, Intel released the first hyperthreaded Pentium 4 for socket 478. Intel Pentium M Banias, image from IntelIn 1999, Intel had begun work on a chip codenamed Timna.