Intel Pentium II 400MHz SECC w/ Heatsink/Fan Slot 1. Specs: 400MHz, 512K L2 cache, Slot 1, 100MHz FSB. If you need a specific S-spec number, please contact us. Processor has been pulled and tested good. Software, drivers, documentation not included. Comes with heatsink & fan. Please click on the Specification URL below for more information.