MICROPROCESSORS’ SOCKETS
Name Package Pins YearDescription
DIP 19788086
DIP 19798088
PLCC 198280286
PLCC 198580386
Socket 1 PGA 169 1989 80486. Found on 486 motherboards, operated at 5 volts and supported 486
chips, plus the DX2, DX4 OverDrive.
Socket 2 PGA 238 80486. A minor upgrade from Socket 1 that supported all the same chips.
Additionally supported a Pentium OverDrive.
Socket 3 PGA 237 1991 80486. Operated at 5 volts, but had the added capability of operating at 3.3
volts, switchable with a jumper setting on the motherboard. Supported all of
the Socket 2 chips with the addition of the 5x86. Considered the last of the
486 sockets.
Socket 4 PGA 273 Intel Pentium. The first socket designed for use with Pentium class
processors. Operated at 5 volts and consequently supported only the low-
end Pentium-60/66 and the OverDrive chip. Beginning with the Pentium-75,
Intel moved to the 3.3 volt operation.
Socket 5 PGA 320 1993 Intel Pentium. Operated at 3.3 volts and supported Pentium class chips
from 75MHz to 133MHz. Not compatible with later chips because of their
requirement for an additional pin. Also compatible with AMD K5 and IDT
WinChip C6
Socket 6 PGA 235 Designed for use with 486 CPUs, this was an enhanced version of Socket 3
supporting operation at 3.3 volts. Barely used since it appeared at a time
when the 486 was about to be superseded by the Pentium.
Socket 7 PGA 321 1994 Intel Pentium MMX. the socket had provision for supplying the split core/IO
voltage required by this and later chips. The interface used for all Pentium
clones with a 66MHz bus. AMD K6-2, AMD K6-III, Cyrix MII, Rise mP6
Socket 8 PGA 387 1995 Used exclusively by the Intel Pentium Pro, the socket proved extremely
expensive to manufacture and was quickly dropped in favour of a cartridge-
based design.
Slot 1 SLOT 242 1997 Intel Pentium II, Pentium III and Celeron. The circuit board inside the
package had up to 512KB of L1 cache on it - consisting of two 256KB chips -
which ran at half the CPU speed.
Slot 2 SLOT 330 1998 Similar to Slot 1, but with the capacity to hold up to 2MB of L2 cache
running at the full CPU speed. Used on Pentium II/III Xeon CPUs.
Slot A SLOT 242 1999 AMD Athlon. AMD interface mechanically compatible with Slot 1 but which
using a completely different electrical interface. Introduced with the original
Athlon CPU.
Socket 370 PGA 370 1999 Intel Pentium III, Intel Celeron, Cyrix III Began to replace Slot 1 on the
Celeron range from early 1999. Also used by Pentium III Coppermine and
Tualatin CPUs in variants known as FC-PGA and FC-PGA2 respectively.
Socket 462 / PGA 462 2000 AMD Athlon, AMD Duron, AMD Athlon XP, AMD Athlon XP-M, AMD
Socket A Athlon MP, AMD Sempron. AMD interface introduced with the first Athlon
processors (Thunderbird) with on-die L2 cache.
Socket 423 PGA 423 2000 Intel Pentium 4. Introduced to accommodate the additional pins required
for the Pentium 4's completely new FSB (Front Side Bus). Includes an
Integral Heat Spreader, which both protects the die and provides a surface
to which large heat sinks can be attached.
Socket 603 PGA 603 2001 The connector for Pentium 4 Xeon CPUs. The additional pins are for
providing more power to future CPUs.
Socket 478 / PGA 478 2000 Intel Pentium 4, Intel Celeron. Its micro Pin Grid Array (µPGA) interface
Socket N allows both the size of the CPU itself and the space occupied by the socket
on the motherboard to be significantly reduced.
Socket 479 PGA 479 2003 Also referred to as the mPGA479M socket, Socket 479 is best known as the
CPU socket for the Intel Pentium M mobile processor (notebook
platforms). The format was also used for desktop PCs.
Socket 754 PGA 754 2003 AMD Athlon 64, AMD Sempron, AMD Turion 64. AMD's 754 CPU
interface form factor introduced with its 64-bit Athlon 64 processor in the
autumn of 2003, finally replacing the longstanding and highly succesful
Socket A. Targeted at budget desktop and mobile 64 bit computing.
Socket 940 PGA 940 2003 AMD Opteron Athlon 64 FX. Subsequently replaced for use by the latter by
Socket 939, which allowed for a less-expensive motherboard option, one
with only four layers rather than from six to nine.
Socket 939 PGA 939 2004 AMD Athlon 64, AMD Athlon 64 FX, AMD Athlon 64 X2, AMD Opteron.
The Socket 939 marked the convergence of the mainstream and FX
versions of the Athlon 64 CPU, which had previously used different
interfaces, the Socket 754 and Socket 940 respectively.
LGA775 / LGA 775 2004 Intel Pentium 4, Intel Pentium D, Intel Celeron, Intel Celeron D, Intel
Socket T Pentium XE, Intel Core 2 Duo, Intel Core 2 Quad, Intel Xeon. Intel's
proprietary CPU socket.
Socket AM2 PGA 940 2006 AMD Athlon 64, AMD Athlon 64 X2. Released just before the Intel
LGA771, the AM2 came as AMD's replacement for the Socket 939 and and
Socket 754.
LGA771 / LGA 771 2006 Intel Xeon. The J stands for "Jayhawk," a processor to have been released
Socket J simultaneously but cancelled. The LGA771 supports the Dual Core Xeon
Dempsey and Woodcrest, Quad Core Clovertown, and Core 2 Extreme
processors.
Socket F LGA 1207 2006 AMD Athlon 64 FX, AMD Opteron. AMD created the Socket F as a socket
940 replacement for its server line processors, particularly the Opteron
range, though it also the high range Athlon 64 FX series of processors.
Socket M PGA 478 2006 Intel Core Solo, Intel Core Duo, Intel Dual-Core Xeon, Intel Core 2 Duo.
For notebook platform. Replaces Socket 479.
Socket AM2+ PGA 940 2007 AMD Athlon 64, AMD Athlon X2, AMD Phenom, AMD Phenom II. This
step up from the socket AM2 improved HyperTransport support and energy
efficiency, though only on AM2+ compatible chips with fully AM2+
motherboards. Seen as a halfway house to socket AM3, takeup on the
socket was arguably disappointing.
Socket P PGA 478 2007 Intel Core 2. For notebook platform. Replaces Socket M
Socket 441 PGA 441 2008 Intel Atom. For netbooks.
LGA1336 / LGA 1336 2008 Intel Core i7 (900 series), Intel Xeon (35xx, 36xx, 55xx, 56xx series).
Socket B DDR3 RAM is required for this socket.
Socket AM3 PGA 941 2009 AMD Phenom II, AMD Athlon II, AMD Sempron. Replaces Socket AM2+.
CPU only has 938 pins, but the socket has 941. AM3 Pkg. CPUs can work
in Socket AM2/AM2+ .
LGA 1156 / LGA 1156 2009 Intel Core i7 (800 series), Intel Core i5 (700, 600 series), Intel Core i3
Socket H (500 series), Intel Xeon (X3400, L3400 series), Intel Pentium (G6000
series), Intel Celeron (G1000 series).
Socket G34 LGA 1974 2010 AMD Opteron (6000 series). Replaces socket F.
Socket C32 LGA 1207 2010 AMD Opteron (4000 series). Replaces Socket F, Socket AM3
LGA 1248 LGA 1248 2010 Intel Itanium 9300-series
LGA 1567 LGA 1567 2010 Intel Xeon 6500/7500-series
LGA 1155 / LGA 1155 2011 Intel Sandy Bridge-DT
Socket H2
LGA 2011 / LGA 2011 2011 Intel Sandy Bridge-B2
Socket R
Socket FM1 PGA 905 2011 AMD Llano
DIP: Dual In-Line package.
PLCC: Plastic Leaded Chip Carrier is a chip carrier with a equiangular plastic housing.
PGA: Pin Grid Array. The package is square or roughly square, and the pins are arranged in a regular array.
LGA: Land Grid Array. It's a type of surface-mount packaging for integrated circuits that is notable for having
the pins on the socket rather than the integrated circuit.
Interesting links:
http://en.wikipedia.org/wiki/CPU_socket
http://en.wikipedia.org/wiki/List_of_Intel_microprocessors
http://en.wikipedia.org/wiki/List_of_AMD_microprocessors