Pentium III

The Intel Pentium III 500 MHz with a 100MHz FSB codenamed Katmai was introduced on February 26, 1999 and initially continued to use the Slot 1 as its connection to the motherboard. With proper BIOS support this processor could also be used on older Pentium II motherboards. Before it's release the Pentium III had a lot of controversy about privacy with the announcement of each processor having a unique identification chip that was intended as a way of help verifying identity of a user over the Internet. Because of the concern Intel this feature is disabled by default.

The Intel Pentium III 550 MHz processor was later released on May 17, 1999 followed by the 600 MHz version on August 2, 1999 and finally the 533B and 600B on September 27, 1999, which had a 133MHz FSB.

Later Intel introduced the Pentium III Coppermine series, which introduced a new type of Pentium III that utilized the Socket 370 socket in addition to the Slot1 configuration. The Intel Pentium III Coppermine 500, 533, 550, 600, 650, 667, 700, and 733 were first introduced on October 25, 1999.