Supported sockets:Slot 1Front Side Bus speed: 66100 MHz Supported architectures: Intel Celeron CovingtonIntel Celeron MendocinoIntel Pentium II DeschutesIntel Pentium II KlamathIntel Pentium III CoppermineIntel Pentium III Katmai Note Some steppings might require updated BIOSmicrocode to work properly. Depending on board revision, it can reach 133MHz FSB.