What’s the 1366 socket?

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Socket 1366 is a CPU socket made by Intel for its Core i7, Celeron, and Xeon brands. It has 1366 pins and uses LGA packaging with FCLGA variant. It replaces LGA 775 and LGA 771 and uses Intel QuickPath Interconnect for improved data transmission.

Socket 1366 is a central processing unit, or processor socket, that the world’s largest semiconductor maker, Intel Corporation, makes for three of its CPU brands: Core i7, Celeron, and Xeon. The number 1366 stands for the number of pins it has. Released in 2008, Socket 1366 is also known as LGA 1366 or Socket B.

The prefix LGA is actually an acronym used to describe its way of packaging integrated circuits, called LGA (land grid array). Rather than having pinholes to accommodate processor pins like different CPU sockets, LGA plans to have the pins on the socket instead. The term grid array is used to describe the orderly arrangement of these pins in rows, as a 1.69 x 1.61 inch (43 x 41 millimeter) grid, on the square socket frame, with a width of 0.83 inch. -0.67 inch (21 x 17 mm) section cut through center. The socket itself measures 1.77 by 1.67 inches (45 by 42.4 mm).

Socket 1366 uses an LGA variant called FCLGA (flip-chip land grid array). This means that the CPU die, which is the wafer of semiconductor material that stores the processor cores, or processing units, is flipped over to expose the back. This is the hottest part of the CPU, and the exposure allows the user to introduce a heat sink, a component that cools certain electronic components. This promotes energy efficiency and reduces the likelihood of processor failure.

Intel primarily designed Socket 1366 for the Core i7, specifically the 9xx series, which it coincidentally introduced the same year. This is currently the top-tier CPU division of the company’s main Core brand. Socket 1366, however, is also compatible with Intel’s low-end Celeron brand, thus replacing LGA 775, or Socket T, which was introduced for its accommodation in 2004. Socket 1366 also replaced LGA 771, o Socket J, which was released in 2006 exclusively for Xeon, Intel’s CPU brand for servers, workstations, and embedded systems.

Like other CPU sockets, this 1,366-pin component is intended to connect the processor with the motherboard of a personal computer (PC) so it can conduct data transmission. To achieve this, Socket 1366 uses Intel QuickPath Interconnect (QPI), which Intel introduced with the socket for its Core i7-9xx series. Similar to its main competitor Advanced Micro Devices’ (AMD) HyperTransport technology, Intel designed the QPI for improved data transmission over the usual front-side bus (FSB) interface. The Core i7-9xx series has data rates of 4.8 or 6.4 gigatransfers per second (GT/s), which means that with the QPI they can make up to 4.8 or 6.4 billion transfers per second.




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