CPU SOCKETS




A CPU socket or CPU slot is a mechanical component that provides mechanical and electrical connections between a microprocessor and a printed circuit board (PCB). This allows the CPU to be replaced without soldering.

Common sockets have retention clips that apply a constant force, which must be overcome when a device is inserted. For chips with a large number of pins, either zero-insertion force (ZIF) sockets or land grid array (LGA) sockets are used instead. These designs apply a compression force once either a handle (for ZIF type) or a surface plate (LGA type) is put into place. This provides superior mechanical retention while avoiding the risk of bending pins when inserting the chip into the socket.

CPU sockets are used in desktop and server computers. As they allow easy swapping of components, they are also used for prototyping new circuits.Laptops typically use surface mount CPUs, which need less space than a socketed part.

Socket
name
Year of introduction CPU families Package Pin count Bus speed Notes
DIP 1970s Intel 8086
Intel 8088
DIP 40 5/10 MHz
PLCC ? Intel 80186
Intel 80286
Intel 80386
PLCC 68, 132 6–40 MHz
Socket 1 1989 Intel 80486 PGA 169 16–50 MHz
Socket 2 ? Intel 80486 PGA 238 16–50 MHz
Socket 3 1991 Intel 80486 PGA 237 16–50 MHz
Socket 4 ? Intel Pentium PGA 273 60–66 MHz
Socket 5 ? Intel Pentium
AMD K5
IDT WinChip C6
IDT WinChip 2
PGA 320 50–66 MHz
Socket 6 ? Intel 80486 PGA 235 ?
Socket 7 1994 Intel Pentium
Intel Pentium MMX
AMD K6
PGA 321 50–66 MHz
Super Socket 7 1998 AMD K6-2
AMD AMD K6-III
Rise mP6
Cyrix MII
PGA 321 66–100 MHz
Socket 8 1995 Intel Pentium Pro PGA 387 60–66 MHz
Slot 1 1997 Intel Pentium II

Intel Pentium III

Slot 242 66–133 MHz Celeron (Covington, Mendocino)
Pentium II (Klamath)
Pentium III (Katmai)- all versions
Pentium III (coppermine)
Slot 2 1998 Intel Pentium II Xeon Slot 330 100–133 MHz
Socket 463/
Socket NexGen
? NexGen Nx586 PGA 463 ?
Socket 499 ? Alpha 21164A Slot 587 ?
Slot A 1999 AMD Athlon Slot 242 100 MHz
Slot B ? Alpha 21264 Slot 587 ?
Socket 370 1999 Intel Pentium III
Intel Celeron
VIA Cyrix III
VIA C3
PGA 370 66–133 MHz
Socket 462/
Socket A
2000 AMD Athlon
AMD Duron
AMD Athlon XP
AMD Athlon XP-M
AMD Athlon MP
AMD Sempron
PGA 462 100–200 MHz This is a double data rate bus having a 400 MT/s(megatransfers/second) fsb in the later models
Socket 423 2000 Intel Pentium 4 PGA 423 400 MT/s (100 MHz) Willamette core only
Socket 478/
Socket N
2000 Intel Pentium 4
Intel Celeron
Intel Pentium 4 EE
Intel Pentium 4 M
PGA 478 400–800 MT/s (100–200 MHz)
Socket 495 2000 Intel Celeron PGA 495 ?
PAC418 2001 Intel Itanium PGA 418 133 MHz
Socket 603 2001 Intel Xeon PGA 603 400–533 MT/s (100–133 MHz)
PAC611 2002 Intel Itanium 2
HP PA-8800, PA-8900
PGA 611 ?
Socket 604 2002 Intel Xeon PGA 604 400–1066 MT/s (100–266 MHz)
Socket 754 2003 AMD Athlon 64
AMD Sempron
AMD Turion 64
PGA 754 200–800 MHz
Socket 940 2003 AMD Opteron Athlon 64 FX PGA 940 200–1000 MHz
Socket 479 2003 Intel Pentium M
Intel Celeron M
PGA 479[8] 400–533 MT/s (100–133 MHz)
Socket 939 2004 AMD Athlon 64
AMD Athlon 64 FX
AMD Athlon 64 X2
AMD Opteron
PGA 939 200–1000 MHz Support of Athlon 64 FX to 1 GHz
Support of Opteron limited to 100-series only
LGA 775/
Socket T
2004 Intel Pentium 4
Intel Pentium D
Intel Celeron
Intel Celeron D
Intel Pentium XE
Intel Core 2 Duo
Intel Core 2 Quad
Intel Xeon
LGA 775 1600 MHz
Socket 563 ? AMD Athlon XP-M PGA 563 ?
Socket M 2006 Intel Core Solo
Intel Core Duo
Intel Dual-Core Xeon
Intel Core 2 Duo
PGA 478 533–667 MT/s (133–166 MHz) For notebook platform
Replaces Socket 479
LGA 771/
Socket J
2006 Intel Xeon LGA 771 1600 MHz
Socket S1 2006 AMD Turion 64 X2 PGA 638 200–800 MHz
Socket AM2 2006 AMD Athlon 64
AMD Athlon 64 X2
PGA 940 200–1000 MHz Replaces Socket 754 and Socket 939
Socket F 2006 AMD Athlon 64 FX
AMD Opteron
LGA 1207 ? Replaces Socket 940
Socket AM2+ 2007 AMD Athlon 64
AMD Athlon X2
AMD Phenom
AMD Phenom II
PGA 940 200–2600 MHz Separated power planes
Replaces Socket AM2
AM2+ Pkg. CPUs can work in Socket AM2
AM2 Pkg. CPUs can work in Socket AM2+
Socket P 2007 Intel Core 2 PGA 478 533–1066 MT/s (133–266 MHz) For notebook platform
Replaces Socket M
Socket 441 2008 Intel Atom PGA 441 400–667 MHz
LGA 1366/
Socket B
2008 Intel Core i7 (900 series)
Intel Xeon (35xx, 36xx, 55xx, 56xx series)
LGA 1366 4.8-6.4 GT/s Replaces server-oriented Socket J (LGA 771) in the entry level.
Socket AM3 2009 AMD Phenom II
AMD Athlon II
AMD Sempron
PGA 941[13] 200–3200 MHz Separated power planes
Replaces Socket AM2+
AM3 Pkg. CPUs can work in Socket AM2/AM2+
Sempron 140 Only
LGA 1156/
Socket H
2009 Intel Core i7 (800 series)
Intel Core i5 (700, 600 series)
Intel Core i3 (500 series)
Intel Xeon (X3400, L3400 series)
Intel Pentium (G6000 series)
Intel Celeron (G1000 series)
LGA 1156 2.5 GT/s DMI bus is a (perhaps modified) PCI-E x4 v1.1 interface
Socket G34 2010 AMD Opteron (6000 series) LGA 1974 200–3200 MHz Replaces Socket F
Socket C32 2010 AMD Opteron (4000 series) LGA 1207 200–3200 MHz Replaces Socket F, Socket AM3
LGA 1248 2010 Intel Intel Itanium 9300-series LGA 1248 4.8 GT/s
LGA 1567 2010 Intel Intel Xeon 6500/7500-series LGA 1567 4.8-6.4 GT/s
LGA 1155/
Socket H2
2011/Q1 Intel Sandy Bridge-DT LGA 1155 5 GT/s Supports 20 PCI-E 2.0 lanes.
LGA 2011/
Socket R
Future (2011/Q3) Intel Sandy Bridge B2 LGA 2011 4.8-6.4 GT/s Supports 40 PCI-E 3.0 lanes.
Socket FM1 2011 AMD Llano Processor PGA 905
Socket
name
Year of introduction CPU families Package Pin count Bus speed Notes

 

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