CPU socket 1
CPU socket
LGA 775, an LGA Socket
Socket A (also known as Socket 462)
A CPU socket or CPU slot is a mechanical
component(s) 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.
Function
A CPU socket is made of plastic, a lever or latch, and
metal contacts for each of the pins or lands on the CPU.
Many packages are keyed to ensure the proper insertion
of the CPU. CPUs with a PGA (pin grid array) package
are inserted into the socket and the latch is closed.
CPUs with an LGA package are inserted into the
socket, the latch plate is flipped into position atop the
CPU, and the lever is lowered and locked into place,
pressing the CPU's contacts firmly against the socket's
lands and ensuring a good connection, as well as increased mechanical stability.
List of 80x86 sockets and slots
CPU socket 2
Socket
name
Year of
introduction
Year of
End Of
Life
CPU families supported Computer
type
Package Pin
count
Pin pitch Bus speed Notes
DIP 1970s Still
available
Intel 8086
Intel 8088
DIP 40 2.54mm 5/10 MHz
PLCC ? Still
available
Intel 80186
Intel 80286
Intel 80386
PLCC 68,
132
1.27mm 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 ? ? Designed
but not used
Socket
7
1994 ? Intel Pentium
Intel Pentium MMX
AMD K6
PGA 321 ? 50–66 MHz
Super
Socket
7
1998 ? AMD K6-2
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,
Deschutes)
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
587
? ? Alpha 21164A Slot 587 ? ?
Slot A 1999 ? AMD Athlon Slot 242 ? 100 MHz
CPU socket 3
Slot B ? ? Alpha 21264 Slot 587 ? ?
Socket
370
1999 ? Intel Pentium III
Intel Celeron
VIA Cyrix III
VIA C3
PGA 370 1.27mm[1] 66–133 MHz
Socket
462/
Socket
A
2000 ? AMD Athlon
AMD Duron
AMD Athlon XP
AMD Athlon XP-M
AMD Athlon MP
AMD Sempron
Desktop 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 1mm[2] 400 MT/s (100 MHz) Willamette
core only
Socket
478/
Socket
N
2000 ~2007 Intel Pentium 4
Intel Celeron
Intel Pentium 4 EE
Intel Pentium 4 M
PGA 478 1.27mm[3] 400–800 MT/s
(100–200 MHz)
Socket
495
2000 ? Intel Celeron PGA 495 1.27mm[4] ?
PAC418 2001 ? Intel Itanium PGA 418 ? 133 MHz
Socket
603
2001 ? Intel Xeon PGA 603 1.27mm[] 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 1.27mm[] 400–1066 MT/s
(100–266 MHz)
Socket
754
2003 ? AMD Athlon 64
AMD Sempron
AMD Turion 64
PGA 754 1.27mm[5] 200–800 MHz
Socket
940
2003 ? AMD Opteron Athlon 64
FX
PGA 940 1.27mm[] 200–1000 MHz
Socket
479
2003 ? Intel Pentium M
Intel Celeron M
PGA 479[6] ? 400–533 MT/s
(100–133 MHz)
Socket
939
2004 11/2008 AMD Athlon 64
AMD Athlon 64 FX
AMD Athlon 64 X2
AMD Opteron
Desktop PGA 939 1.27mm[] 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
Desktop LGA 775 1.09mm x
1.17mm[7]
1600 MHz
Socket
563
? ? AMD Athlon XP-M PGA 563 ? ?
CPU socket 4
Socket
M
2006 ? Intel Core Solo
Intel Core Duo
Intel Dual-Core Xeon
Intel Core 2 Duo
Notebook PGA 478 ? 533–667 MT/s
(133–166 MHz)
Replaces
Socket 479
LGA
771/
Socket
J
2006 ? Intel Xeon Server LGA 771 1.09mm x
1.17mm[8]
1600 MHz
Socket
S1
2006 ? AMD Turion 64 X2 PGA 638 1.27mm[9] 200–800 MHz
Socket
AM2
2006 ? AMD Athlon 64
AMD Athlon 64 X2
PGA 940 1.27mm[] 200–1000 MHz Replaces
Socket 754
and Socket
939
Socket
F
2006 ? AMD Athlon 64 FX
AMD Opteron
LGA 1207 1.1mm[10] ? Replaces
Socket 940
Socket
AM2+
2007 ? AMD Athlon 64
AMD Athlon X2
AMD Phenom
AMD Phenom II
PGA 940 1.27mm[] 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 Notebook PGA 478 533–1066 MT/s
(133–266 MHz)
Replaces
Socket M
Socket
441
2008 ? Intel Atom Sub-notebook PGA 441 ? 400–667 MHz
LGA
1366/
Socket
B
2008 ? Intel Core i7 (900 series)
Intel Xeon (35xx, 36xx,
55xx, 56xx series)
Server LGA 1366 4.8-6.4 GT/s Replaces
Socket J
(LGA 771)
in the entry
level.
rPGA
988A/
Socket
G1
2008 ? Intel Core i7 (600, 700,
800, 900 series)
Intel Core i5 (400, 500
series)
Intel Core i3 (300 series)
Intel Pentium (P6000
series)
Intel Celeron (P4000
series)
Notebook rPGA 988 1mm 2.5GT/s, 4.8GT/s
CPU socket 5
Socket
AM3
2009 ? AMD Phenom II
AMD Athlon II
AMD Sempron
PGA 941[11]
or
940[12]
1.27mm[] 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 2012 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)
Desktop 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
Server LGA 1248 ? 4.8 GT/s
LGA
1567
2010 ? Intel Intel Xeon
6500/7500-series
Server LGA 1567 ? 4.8-6.4 GT/s
LGA
1155/
Socket
H2
2011/Q1
2011.01.09
? Intel Sandy Bridge
Intel Ivy Bridge
Desktop LGA 1155 ? 5.7, GT/s Sandy
Bridge
supports 20
PCI-E 2.0
lanes.
Ivy Bridge
supports 40
PCI-E 3.0
lanes.
Intel
Mainstream
Socket.
CPU socket 6
LGA
2011/
Socket
R
2011/Q3
(2011.11.14)
? Intel Sandy Bridge-E
Intel Ivy Bridge-E
Server LGA 2011 ? 4.8-6.4 GT/s Sandy
Bridge
supports 20
PCI-E 2.0
lanes.
Ivy Bridge
supports 40
PCI-E 3.0
lanes.
Intel
enthusiast
Socket.
rPGA
988B/
Socket
G2
2011 ? Intel Core i7 (2000, 3000
series)
Intel Core i5 (2000, 3000
series)
Intel Core i3 (2000, 3000
series)
Notebook rPGA 988 1mm 2.5GT/s, 4.8GT/s
Socket
FM1
2011 ? AMD Llano Processors Desktop PGA 905 1.27mm used for 1st
generation
APUs
Socket
AM3+
2011 ? AMD FX Vishera
AMD FX Zambezi
AMD Phenom II
AMD Athlon II
AMD Sempron
Desktop PGA 942
(CPU
71pin)
1.27mm
Socket
FM2
2012 ? AMD Trinity Processors Desktop PGA 904 1.27mm used for 2nd
generation
APUs
LGA
1150/
Socket
H3
2013/Q2
(2013.06.02)
? Intel Haswell
Intel Broadwell
Desktop LGA 1150 ?
Socket
G3/
Socket
G3
2013/Q2 ? Intel Haswell
Intel Broadwell
Notebook rPGA 889 ?
Socket
name
Year of
introduction
Year of
EOL
CPU families Computer
type
Package Pin
count
Pin pitch Bus speed Notes
CPU socket 7
Slotkets
Slotkets are special adapters for using socket processors in bus-compatible slot motherboards.
References
[6] CPU only has 478 pins, but the socket has 479.
[11] CPU only has 938 pins, but the socket has 941.
[12] AMD Documentation
External links
• Socket ID Guide (http:/ / www. cpushack. net/ SocketID. html)
• CPU Sockets Chart (http:/ / pclinks. xtreemhost. com/ ) - A fairly detailed table listing x86 Sockets and associated
attributes.
• techPowerUp! CPU Database (http:/ / www. techpowerup. com/ cpudb/ )
• Processor sockets (http:/ / www. cpu-world. com/ Sockets/ index. html)
Article Sources and Contributors 8
Article Sources and Contributors
CPU socket Source: http://en.wikipedia.org/w/index.php?oldid=559642167 Contributors: AMD64, AdjustShift, AeonHun, Agateller, Al Lemos, Alansohn, Aldie, AleksaITInfo, Aluvus,
Andrewcrawford, Andros 1337, Arndbergmann, Arthena, Asa Zernik, Aunva6, Azazello, BMT, Bellamatte, Bluewater4050, Bomazi, Chealer, Cheezmeister, Chepry, Chris S, Chris the speller,
Christopherlin, Commandersonic00, CoupleKlonopin, Curiouscorey, DanielCD, DaveJB, Denisarona, Denniss, Devzero2000, Diblidabliduu, Download, DuoDeathscyther 02, Dysprosia, Ed g2s,
Electron9, Elhoim, FReaKaNDeLL, Falante, Feneeth of Borg, Fernvale, Fofo fr, Frap, FxJ, Fylbecatulous, Fæ, Galraedia, Ganimoth, Gardar Rurak, Gaul, Giraffedata, Goatonastik, Gogo Dodo,
GoldKanga, Greyhound64, Groupmsl, Guy Harris, Hawke666, Hellcat fighter, Ibliz, Ihavearedcouch, InternetMeme, Intgr, Iridescent, Ixfd64, JDrage, James086, JamesBWatson, Jamoross,
Janegro24, Jasonr lau, Jayetheartist, Jeffq, Jgp, JordiG, Jovincruzin, KFP, Kaini, Kaizehk, Kbolino, Kernel.package, Kh555, Klilidiplomus, Kool2bchilln, Korath, Krishna.91, Kumul, Leedeth,
Lenry NmQ, Lprd2007, LuK3, Luihopan, LukeDG, Lzur, Mathias-S, Mertcan137, Mibilove, Mohammad-Zuhair, Moxfyre, Navair2, Nerfari, NoErr, Norm, Octahedron80, Oni Lukos, P345,
PHenry, Paranoidmage, Paul1337, Pgk1, PhilKnight, Pinkadelica, Placi1982, Polarissilver, Praetor alpha, Quadell, Questionlp, Raamin, Rambaye, Rd232, Rilak, Salam32, Sbenton, Seaphoto,
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Thenborn, TheoloJ, TimBentley, TimSE, Tobias Bergemann, Tom strom, Tuxthepenguin933, UncleDouggie, Versageek, Voidxor, WannabeAmatureHistorian, Wderousse, Wengier, Werdan7,
WizardOfTheNorth, Wtshymanski, Xajel, Xeper, XselenS, Yellow2140, Yyy, Zanimum, Zarius, Отец Евгений, 394 anonymous edits
Image Sources, Licenses and Contributors
File:CPU Socket 775 T.jpg Source: http://en.wikipedia.org/w/index.php?title=File:CPU_Socket_775_T.jpg License: Creative Commons Attribution-Sharealike 3.0 Contributors: Appaloosa
File:SocketA.jpg Source: http://en.wikipedia.org/w/index.php?title=File:SocketA.jpg License: Creative Commons Attribution-ShareAlike 3.0 Unported Contributors: FxJ
License
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