What Is a CPU Socket?

CPU sockets are mainly divided into Socket and Slot, which are sockets for installing CPU. After so many years of development, the CPU has adopted pin, card, contact, and pin types. The widely used CPU interfaces are generally pin-type interfaces, and there are corresponding socket types on the motherboard. Different types of CPU interfaces have changes in the number of sockets, volume, and shape, so they cannot be connected to each other. ^[1]

Complete set: list of historical CPU sockets and supported CPUs

* Socket AM4 AMD Ryzen processor

* LGA1151 intel core i3 / i5 / i7 6XXX series / 7XXX series

* LGA1150 intel core i3 / i5 / i7 4XXX series / 5XXX series

* LGA2011 intel core i7 39XX series

* LGA1155 Intel core i3 / i5 / i7 2XXX series, Pentium / Celeron GXXX series

* LGA1156 Intel core i7 8XX series, core i5 7XX / 6XX series, core i3 5XX series Pentium / Celeron GXXXX series

* LGA1366 Intel core i7 9XX series

* Socket FM1 AMD A-Series APU

* Socket AM3 + AMD FX processor

* Socket AM3 AMD Athlon IIX2 / X3 / X4, Nine Dragons II X2 / X3 / X4, Sempron X2

* Socket AM2 + AMD Athlon X2, Nine Dragons X2 / X3 / X4

* PAC611Intel Itanium

* PAC418Intel Itanium

* LGA 775 (Land Grid Array-775) Intel Pentium 4, Pentium D, Pentium Extreme Edition, Core 2 Duo (Conroe), Core 2 Extreme and Celeron D

LGA771 The LGA771 interface will first be applied to future Xeon DP processors, using 90nm technology, supporting hyper-threading and

CPU socket representative

We know that the CPU needs to be connected to the motherboard through some interface to work. After so many years of development, the CPU has adopted pin, card, contact, and pin interfaces. The CPU interfaces are all pin-type interfaces, corresponding to

Socket 478

There are corresponding slot types on the motherboard. Different types of CPU interfaces have changes in the number of sockets, volume, and shape, so they cannot be connected to each other.

Socket 478

The original Socket 478 interface was the type of interface used by the early Pentium 4 series processors, with a pin count of 478 pins. The Socket 478's Pentium 4 processor has a small area and its pins are arranged very closely. Intel's Pentium 4 series and P4 Celeron series use this interface, this type of CPU has gradually withdrawn from the market.

However, Intel introduced a new Socket 478 interface in early 2006. This interface is a special interface of Intel's Core Duo-based processors Core Duo and Core Solo. Compared with the earlier desktop version of the Pentium 4 series, the Socket 478 interface Although the number of pins is 478, the pin definition and important parameters such as voltage are completely different, so the two are not compatible with each other. As Intel's processors are fully transferred to the Core architecture, more and more processors will use the new Socket 478 interface in the future. For example, Celeron M with the upcoming Core architecture will also use this interface.

Socket 775

Socket 775 is also called Socket T, which corresponds to the CPU used in Intel LGA775 package.

Socket 775

Interface, this kind of interface has a single-core Pentium 4, Pentium 4 EE, Celeron D, LGA775 package and dual-core Pentium D and Pentium EE CPUs. Unlike the previous Socket 478 interface CPU, the socket of the Socket 775 interface CPU does not have traditional pins at the bottom. Instead, it has 775 contacts, that is, not pin type but contact type. The stylus contacts to transmit the signal. The Socket 775 interface can not only effectively improve the signal strength and frequency of the processor, but also improve the yield of the processor and reduce the production cost. With the gradual fading of Socket 478, Socket 775 has become the standard interface for Intel desktop CPUs.

Socket 754

Socket 754 is the CPU interface when the AMD 64-bit desktop platform was originally released in September 2003, with 754 CPUs

Socket 754

Pin, only supports single-channel DDR memory. Adopting this interface are the low-end models of Athlon 64 for desktop platforms and high-end models of Sempron, as well as Mobile Sempron, Mobile Athlon 64 and Turion 64 for mobile platforms. As AMD fully shifts to support DDR2 memory from 2006, the desktop platform's Socket 754 will gradually be replaced by Socket AM2 to make AMD's desktop processor interface unified, and at the same time, the mobile platform's Socket 754 will gradually have Replaced by 638 CPU pins and Socket S1 supporting dual-channel DDR2 memory. Socket 754 was eliminated at the end of 2007 to complete its historical mission, and its life span was much longer than what was once claimed to replace its own Socket 939.

Socket 939

Socket 939

Socket 939 is a 64-bit desktop platform interface standard introduced by AMD in June 2004. It has 939 CPU pins and supports dual channel DDR memory. The Opteron 1XX series for the entry-level server / workstation market and the Athlon 64 and Athlon 64 FX and Athlon 64 X2 for the desktop market. Other Semprons for OEMs also use the Socket 939 interface. The Socket 939 processor and the previous Socket 940 socket cannot be mixed, but the Socket 939 still uses the same CPU fan system mode. Since 2006, AMD has fully turned to support DDR2 memory. 939 was replaced by Socket AM2. It completed its historical mission in early 2007 and was eliminated. Its life span was less than 3 years from launch to elimination.

Socket 940

Socket 940

Socket 940 is the earliest released AMD64-bit CPU interface standard. It has 940 CPU pins and supports dual-channel ECC DDR memory. This interface is used by the server / workstation Opteron and the original Athlon 64 FX. With the new Athlon 64 FX and some of the Opteron 1XX series switching to the Socket 939 interface, the Socket 940 has become a dedicated interface for the full Opteron 2XX series and the full Opteron 8XX series and some Opteron 1XX series. With AMD starting to fully support DDR2 memory from 2006, Socket 940 will gradually be replaced by Socket F, completing its historical mission and thus being eliminated.

Socket 603

Socket 603

Socket 603 is more professional, and is used in Intel's high-end server / workstation platforms. The CPUs that use this interface are Xeon MP and early Xeon, with 603 CPU pins. Socket 603 interface CPU can be compatible with Socket 604 socket.

Socket 604

Similar to Socket 603, Socket 604 is still applied to Intel's high-end

Socket 604

Server / workstation platform, the CPUs using this interface are 533MHz and 800MHz FSB Xeon. The Socket 604 interface CPU is not compatible with the Socket 603 socket.

Socket A

Socket A interface, also called Socket 462, is the socket interface of AMD Athlon XP and Duron processors. The Socket A interface has 462 slots and can support 133MHz FSB.

Socket A

Socket 423

Socket 423 is the standard interface of the original Pentium 4 processor. The shape of Socket 423 is similar to the previous types of sockets, and the corresponding number of CPU pins is 423. With the popularity of DDR memory, Intel has developed an i845 chipset that supports SDRAM and DDR memory. The CPU socket has also been changed to Socket 478, and the Socket 423 interface has disappeared.

Socket 423

Socket 370

The Socket 370 architecture was developed by Intel to replace the SLOT architecture. It looks very similar to Socket 7 in appearance and also uses a zero insertion force socket. The corresponding CPU is 370 pins. Intel's famous "copper mine" and "Tualatin" series CPUs use this interface.

Socket 370

SLOT 1

SLOT 1 is a CPU interface developed by Intel Corporation to replace Socket 7, and applied for a patent. This makes it impossible for other manufacturers to produce SLOT 1 interface products. The CPU of the SLOT1 interface is no longer familiar with the square shape, but has become a flat rectangular parallelepiped, and the interface has also become a gold finger, no longer a pin form. SLOT 1 is a slot designed by Intel Corporation for the Pentium series CPU. It uses the Pentium CPU, its related control circuit, and the secondary cache on a daughter card. This interface has been eliminated.

SLOT 2

SLOT 2 is more professional, and is used in high-end server and graphics workstation systems. The CPU used is also the very expensive Xeon (Xeon) series. The Slot 2 slot is longer than the SLOT 1. With the Slot 2 design, eight processors can be used in a server at the same time. In addition, Pentium CPUs with Slot 2 interfaces all adopted the most advanced 0.25 micron manufacturing process at that time. There are 440GX and 450NX motherboard chipset supporting SLOT 2 interface.

SLOT A

SLOT 2

The SLOT A interface is similar to the Intel SLOT 1 interface and is used by AMD's K7 Athlon. In terms of technology and performance, the SLOT A motherboard is fully compatible with the original various peripheral expansion card devices. It does not use Intel's P6 GTL + bus protocol, but Digital's Alpha bus protocol EV6. The EV6 architecture is a more advanced architecture. It uses a multi-threaded point-to-point topology and supports a 200MHz bus frequency.