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Processor sockets

Slot 1—Intel 242-contact microprocessor connector also known as an SC242. Designed for the Pentium II, Celeron, and also can be used by some Pentium IIIs. Operates from 2.0V–3.3V.  Accepts microprocessor cartridges in three form factors: SEPP (Single-Edged Processor Package), SECC (Single-Edged Contact Cartridge), and SECC-2.

Slot 2—Intel 330-contact microprocessor connector also known as an SC330. Designed for the Xeon. Accepts microprocessor cartridges in the SECC-2 form factor.

Slot A—AMD 242-contact microprocessor connector that is reversed from, and thus incompatible with, Slot 1. Designed for the Athlon.

 

Socket 1—Intel 169-pin microprocessor ZIF connector.
Designed for the 80486, 80486DX/2/4.

Socket 2—Intel 238-pin microprocessor ZIF connector.
Designed for the 80486 OverDrive. Also supports all the Socket-1 CPUs.

Socket 3—Intel 237-pin microprocessor ZIF connector. Designed for the 5x86. Also supports all the Socket-1 and 2 CPUs. Can operate at both 5V and 3.3V.  The last of the 486 sockets.

Socket 4—Intel 273-pin microprocessor ZIF connector.
Designed for the Pentium 60-66. Operates at 5V.

Socket 5—Intel 320-pin microprocessor ZIF connector.
Designed for the Pentium 75-133. Operatesat 3.3V.

Socket 6—Intel 235-pin microprocessor ZIF connector. Slightly advanced form of Socket 3 designed for all 486s. Operates at 3.3V. Never used by manufacturers.

Socket 7—Intel 321-pin microprocessor ZIF connector. Designed for the Pentium 75+. Also used by AMD K5, K6 series, and Cyrix CPUs. Can operate at 2.5V–3.3V.

Socket 8—Intel 387-pin microprocessor ZIF connector. Designed for the Pentium Pro. Operates at 3.1–3.3V. This socket was later attached to a slotket that fit the Slot 1.


Socket A—AMD 462-pin microprocessor ZIF connector. Designed for the Athlon and Duron.

Socket 370 PPGA (Plastic Pin Grid Array) and FC-PGA (Flip Chip Pin Grid Array)
—Intel 370-pin microprocessor ZIF connector. Designed for Celerons and Pentium IIIs. Operates at 1.5–1.8V.

Socket 423 (PGA423) and Socket478 (PGA478)—Intel 423-pin microprocessor ZIF connector.  Designed for the Pentium 4. Operates at 1.7V. Replaced in the summer of 2001 by the improved PGA478 socket.


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