24 June 2023

ARM Vs X86 | Difference | Comparison

The main differences between ARM and X86 are in terms of cost, power consumption, and performance. ARM processors are more power efficient than X86, and therefore are preferable in battery-powered devices. 

What is ARM?

ARM stands for advanced RISC machine, It is an instruction set architecture(ISA) developed by ARM Holding which is designed for the reduction of complexity, power consumption, and cost in computer processors and other components. This architecture is widely used in mobile phones, personal digital assistants, and handhelds.

Learn More about x64 Vs x86

What is x86?

x86 is a CISC (Complex instruction set computing) instruction set architecture developed by Intel Corporation and introduced in 1978. It is the most popular ISA used in PCs. It has been extensively used in desktop, laptop, and server computers since the 1980s. 

ARM Vs X86 | Difference between ARM and X86

  • ARM uses reduced instruction set computing architecture(RISC), but X86 uses complex instruction set computing architecture(CISC).
  • While X86 processes complex instructions one at a time over a longer period of time than ARM, ARM processes a single instruction every cycle.
  • ARM optimization of performance with a software-focused approach, whereas X86 hardware approach to optimize performance.
  • X86 uses greater memory and fewer registers, but ARM uses more memory and more registers.
  • ARM pipelining of instruction is unique, on the other hand, X86 is less pipelined.
  • ARM is faster execution of instruction reduces time, X86 is time to execute is more.
  • ARM is complex addressing managed by software, and X86 is inherently designed to handle complex addresses.
  • ARM is complier and plays a key role in managing operations, X86 is the microprogram that does the trick.
  • ARM managing code expansion is difficult, in X86 code expansion is managed easily.
  • ARM is multiple instructions generated from a complex one and executed individually, X86 architecture is capable of managing complex statement execution at a time.
  • Decoding of instruction is handled easily in ARM,  In X86, Decoding is handled in a complex way.
  • ARM uses available memory for calculation, and X86 needs supplemented memory for calculations.
  • ARM deployed in mobile devices where size, and power consumption speed matter, whereas X86 deployed in servers, desktops, and laptops where high performance and stability matter.
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