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Definition: ARM server
A file or application server that uses an ARM CPU. Although x86 CPUs have been the mainstay in the datacenters of enterprises and cloud providers, ARM-based servers emerged in the late 2010s. For example, AMD began to offer its Opteron A1100 ARM servers in 2016. In 2018, Ampere launched its first ARM-based processors for servers. Although Intel's x86 architecture dominates the server world almost exclusively, ARM servers offer more efficiency and are expected to gain market share. See ARM processor and ARM.
An ARM Server from Lenovo
This Lenovo ThinkSystem is a rack-mounted ARM server (see rack mounted). It contains six drive bays and an ARM CPU from Ampere Computing, a company founded by an ex-Intel employee to compete with x86 servers. The CPU has 32 cores running at 3.3 GHz. (Image courtesy of Lenovo.)