microarchitecture
The design of a processor such as a CPU or GPU. The microarchitecture defines how the processor executes its instructions, including the pipelines and caches. For example, in Intel's family of x86 CPUs, x86 is the instruction set, while Sapphire Rapids, Raptor Lake and Meteor Lake are some of the microarchitectures. See cache, CPU, GPU and x86.
Early Intel Examples
Since 1979, Intel has created numerous microarchitectures for its x86 CPUs. For example, P5 was the first microarchitecture used in the Pentium chips. Starting in 2008, the Nehalem microarchitecture was used in Core i CPUs. See Intel microarchitectures.