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.