Think of an instruction set architecture (ISA) as a language that the CPU understands.
- AMD64 refers to x86-64 architecture.
- AMD comes from the AMD company (Advanced Micro Devices).
- Generally:
X64 == AMD64 == x86-64.
- ARM (advanced RISC machine).
- Typically more power-efficient, and s is used often in mobile devices and Raspberry Pis.