Intel's latest 32Bit Pentium class processor.
It uses a deep-pipeline design and Intel's latest processing technology to produce clock speeds starting at 1.4GHz. The Front Side Bus has a data rate of 400 Million Transfers / Sec. This is 3 times faster than the previous bus speed of 133MHz FSB of the Pentium(r)III.
It also implements even more SSE instructions.
The code name for Pentium(r)4 was Willamette, named after the River or Valley in Northwest Oregon.