The Intel Pentium III CPU 667MHz Coppermine core processor is a unit with a 256 KB L2 cache and a bus speed of 667 MHz. It features a single core and belongs to the Pentium III processor model series. This CPU is designed for use with a Socket 370 motherboard, making it compatible with certain older computer systems. With its reliable brand reputation and specific processor features, the Intel Pentium III CPU offers a solid performance for a range of computing tasks.