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Socket B, also known as LGA 1366, is a CPU socket from Intel for Core i7, Celeron, and Xeon processors. It has 1,366 pins and uses Intel QuickPath Interconnect for data transfer. It replaced LGA 775 and 771 and is compatible with some Intel Core i7 CPUs. The socket has pins and is designed to connect the CPU to the motherboard for data transmission and protection. It uses a pin grid array (PGA) and flip-chip land grid array (FC-LGA) form factor. It measures 1.77 by 1.67 inches and can handle a dynamic force of 890 newtons and a static force of 266 newtons.
Socket B is a central processing unit (CPU), or processor socket, from the semiconductor company Intel Corporation for its Core i7, Celeron, and Xeon processors. Its defining feature is its 1,366 pins. For this reason, Socket B is also referred to as LGA 1366.
Intel introduced Socket B in 2008 as a replacement for LGA 775, also known as Socket T. This socket was used to support some Celeron brand processors, which go into budget oriented personal computers. For Xeon, intended for embedded systems, servers and workstations, it replaced LGA 771 or Socket J. Also, Socket B is compatible with some Intel Core i7 CPUs; these represent the top tier of the company’s first consumer-oriented line of computer chips. The Core i7, unlike the LGA 775-compliant Celerons and Xeons, for which LGA 1366 is backwards compatible, was the first Intel CPU made specifically for the socket.
Socket B’s alternative term LGA prefix is actually an acronym for land grid array. With this type of design, the socket has pins. This separates socket B from many other CPU sockets, which have pinholes to accommodate processor pins. Regardless of design, Socket B shares the same purpose with other similar components: to connect the CPU to the motherboard for data transmission, as well as provide protection from potential damage when inserted or removed.
Many processors transfer data using the front-side bus (FSB). This is an interface that allows the CPU to do data transfer. With Socket B, however, Intel introduced Intel QuickPath Interconnect (QPI) to perform this task instead. Designed to be faster and more efficient than FSB, QPI was Intel’s answer to the similar HyperTransport used by its main competitor, Advanced Micro Devices (AMD).
Socket B’s 1,366 pins are arranged in neat rows of four along the sides of its square shape, prepared to accept processors measuring 1.77 by 1.67 inches (45 by 42.4 millimeters). This layout is called a pin grid array (PGA). Socket B in particular uses the flip-chip land grid array (FC-LGA) form factor, so called because the chip is essentially flipped over to expose its hot surface. People usually choose to place a heat sink on top of it to cool it down and thus increase energy efficiency by avoiding malfunctions. According to Intel, the mechanical load limits of the 1,366-pin socket consist of a dynamic force of 890 newtons (200 lb-f) and a static force of 266 newtons (60 lb-f).
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