With the introduction of the Pentium II CPU, the need for greater access for testing had made the transition from socket to slot necessary.

Previously with the Pentium Pro, Intel had combined processor and cache dies in the same Socket 8 package.

As a result, a single, tiny flaw in either die made it necessary to discard the entire assembly, causing low production yield and high cost.

These cards could also be easily plugged into a Slot 1, thereby eliminating the chance for pins of a typical CPU to be bent or broken when installing in a socket.

There are also converter cards, known as Slotkets, which hold a Socket 8 so that a Pentium Pro CPU can be used with Slot 1 motherboards.

The Single Edge Contact Cartridge, or "SECC", was used at the beginning of the Slot 1-era for Pentium II CPUs.

The back of the housing is plastic and has several markings on it: the name, "Pentium II"; the Intel logo; a hologram; and the model number.

[4] Only the front plate was carried over, the coolers were now mounted straight to the PCB and exposed CPU die and are, as such, incompatible with SECC cartridges.