CPU Components

1. ALU - Responsible only for integer operations.
2. FPU - Responsible only for floating point operations.
3. SIMD - Single Instruction, Multiple Data.
4. Registers - Holding data.
5. LSU - Load and store unit responsible for handling memory operations.
6. CU - Control unit responsible for the execution.
7. Cache - Multiple cache layers.
8. MMU - Memory management unit responsible for mapping virtual memory addresses to physical ones.

SIMD

SIMD is also called as Vector Unit. It's for high speed processing for arrays where entire array operations are just done in one go instead of using FOR loops.

SIMD availability

SIMD is available in most modern day CPU architectures but its more powerful and heavily used in GPU hardware.