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An ARM server, or Advanced RISC Machine server, is a server that uses ARM processors or chips instead of traditional x86 class processors. This allows the server structure to produce specific results with less energy waste.
The use of ARM chips in servers is based on a particular theory of computer hardware design. RISC machines are “reduced instruction set computing” machines with a 32-bit reduced instruction set that replaces the full capability of a traditional processor. Using multiple ARM processors, the ARM server can rely on specific ARM chips for specific functionality in an efficient way, because of the build of the chip itself. Reduced instruction set computing is used in many other parts of the IT industry, but with ARM servers, it is specifically applied to server performance.