CPU Sockets
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The term CPU socket or CPU slot is widely used to describe the connector linking the motherboard to the CPU in certain types of desktop and server laptops, particularly those compatible with the Intel x86 architecture.

Most CPU sockets and processors in use today are built around the pin grid array (PGA) architecture, in which the pins on the underside of the processor are inserted into the socket. To aid installation, zero insertion force sockets are usually used, allowing the processor to be inserted without any resistance, while gripping the pins firmly once the processor is in place to ensure a reliable contact.

An alternative to the PGA architecture is the land grid array (LGA) in which the pins reside on the socket rather than the CPU.

In contrast to CPU sockets, slot based processors and CPUs use a single- edged connection rather than a socket and slot into the motherboard.

AMD Sockets

Super Socket 7 – AMD K6-2, AMD K6-III; Rise mP6.

Socket 563 – AMD low-power mobile Athlon XP-M

Socket 754 – AMD single- processor socket  featuring single-channel DDR- SDRAM. Supports AMD Athlon 64, Sempron, Turion 64 processors.

Socket 939 – AMD single- processor socket featuring dual- channel DDR-SDRAM. Supports Athlon 64,Athlon 64 FX to 1 GHz2, Athlon 64 X2, Opteron 100- series processors. Superceded by Socket AM2 after about 2 years of launch.

Socket 940 – AMD single and multi-processor socket featuring  DDR- SDRAM. Supports AMD Opteron 2, Athlon 64 FX processors.

Socket A –  AMD socket supporting Athlon, Duron, Athlon XP, Athlon XP-M, Athlon MP, Sempron processors.

Socket AM2 – AMD single processor socket featuring DDR2-SDRAM. Replaces Socket 754 and Socket 9392.

Socket AM2+ – Future AMD socket for single processor systems. Features support for DDR2 and HyperTransport 3 with separated power lanes.

Socket AM3 – Future AMD socket for single processor systems. Features support for DDR3 and HyperTransport 3 with separated power lanes.

Socket F – AMD multi – processor socket featuring DDR2-SDRAM. Supports AMD Opteron2 processors.

Socket S1 – AMD socket for mobile platforms featuring DDR2-SDRAM. Replaces Socket 754 for mobile processors.

Intel Sockets

40 pin DIP – Intel 8086, Intel 8088.

68 pin PLCC – Intel 80186, Intel 80286, Intel 80386

Socket 1 – 80486

Socket 2 – 80486

Socket 3 – 80486 and compatibles

Socket 4 – Intel Pentium 60/66 MHz

Socket 5 – Intel Pentium 75 – 133 MHz; AMD K5; IDT WinChip C6, WinChip 2

Socket 6 – Designed but not used

Socket 7 – Intel Pentium, Pentium MMX; AMD K6

Socket 8 – Intel Pentium Pro

Socket 370 – Intel Pentium III, Celeron; Cyrix III; VIA C3

Socket 423 – Intel Pentium 41 Willamette core

Socket 478 – Intel Pentium 4, Celeron, Pentium 4 Extreme Edition 1, Pentium M

Socket 479 – Intel Pentium M and Celeron M

Micro-FCBGA – Intel Mobile Celeron, Core 2 Duo, Core Duo, Core Solo, Celeron M, Pentium III, Mobile Celeron

Socket 486 – 80486

Socket 495 – Celeron/ P3

Socket 499 – DEC Alpha 21164a

Socket 603 – Intel Xeon

Socket 604 – Intel Xeon

LGA 771/ Socket 771/ Socket J – Intel Xeon

LGA 775/ Socket 775/ Socket T – Intel Pentium 4, Pentium D, Celeron D, Pentium Extreme Edition, Core 2 Duo, Core 2 Extreme, Celeron 1, Xeon 3000 series, Core 2 Quad

PAC418 – Intel Itanium

PAC611 – Intel Itanium 2, HP PA – RISC 8800 and 8900

Socket B/ LGA 1366 – a new socket for future Intel CPUs incorporating the integrated memory controller and Intel QuickPath Interconnect.

Socket H/ LGA 715 – a future replacement for the current Socket T

Socket M – Intel Core Solo, Intel Core Duo and Intel Core 2 Duo

Socket N – Intel Dual – Core Xeon LV

Socket P – Intel – based; replaces Socket 479 and Socket M

Slots

Slot 1 – Intel Celeron, Pentium II, Pentium III

Slot 2 – Intel Pentium II Xeon, Pentium III Xeon

Slot A – AMD Athlon

Slot B – DEC Alpha

Sokets –  adapters for using socket processors in bus – compatible slot motherboards.

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