Slot 1 / Slot SC242

Slot 1 (also Slot1 or SC242) is a Slot-type connector with 242 contacts. This connector was designed for Pentium II family of processors, and later used for Celeron budget line of processors. Pentium III was the last microprocessor family that used the Slot 1. For its next generation of Pentium processors - Pentium 4, Intel completely abandoned the Slot1 architecture. The fastest processor that can be used in the Slot 1 motherboards is the Pentium III 1133 Mhz with 133 MHz FSB (S-spec number SL4YV).

Slot 1 connector is 5.23" long (13.29 cm). Besides the actual connector, the Slot 1 also includes SEC cartridge retention mechanism required to support a processor in SEC cartridge and a heatsink. Maximum supported weight of the processor with the heatsink is 400 g.

Supported processors

Celeron (Covington) (266 - 300 MHz)
Celeron (Mendocino) (266 - 433 MHz)
Pentium II (233 - 450 MHz)
Pentium III (Katmai) in SECC2 package (450 - 600 MHz)
Pentium III (Coppermine) in SECC2 package (500 - 1133 MHz)

Celeron (PPGA) and Pentium III (FC-PGA) processors can be used in Slot 1 motherboards with the help of slotket (slocket) adapters.

Compatible package types

Single Edge Connector Cartridge (SECC)
Single Edge Connector Cartridge 2 (SECC 2)
Single Edge Processor Package (SEPP)