ASIC Application-Specific Integrated Circuit
Application-Specific Integrated Circuit — a chip designed and manufactured for a single specific task, rather than being generally programmable. Since the hardware is tailored, an ASIC is dramatically faster and more energy-efficient for its task than a general CPU/GPU — but it can't do anything else.
Trade-off: a CPU is flexible (runs anything) but inefficient for specialized tasks; an ASIC bakes the function directly into the silicon → maximum performance per watt, but only for what it was built for. Use case: Bitcoin mining (ASICs made GPU mining hopeless — they only do SHA-256 hashing, but millions of times more efficiently), Google's TPU (matrix multiplication for AI), networking chips, and fixed-function blocks in an SoC (video decoding, crypto). Downside: an enormous development cost and long lead time (designing and manufacturing a custom chip costs millions and takes years) → it only pays off at high volume or for extreme performance requirements. The middle ground is an FPGA (reprogrammable hardware — more flexible than an ASIC, faster than a CPU, but more expensive/slower than a finished ASIC). The driver behind the dark-silicon era's specialized accelerators. Related to SoC and dark silicon.