(Single Edge Contact Cartridge) A CPU module from Intel that held Pentium II and Pentium III chips and their L2 cache chips. The SECC plugged into Slot 1 on the motherboard and contained a single edge processor package (SEPP), which was the printed circuit board used for Celeron chips without the cartridge housing (see SEPP). SECC and SECC2 Introduced in the late 1990s, the Pentium II used the SECC, while the Pentium III used the subsequent SECC2 with a slightly different casing. Both types were 242-pin cartridges. See Slot 1.