accelerator board(1) Short for graphics accelerator.
(2) A type of expansion board that makes a computer faster by adding a faster CPU or FPU. Most modern computers are designed to accept simpler upgrades. Built into the motherboard is a socket in which the CPU sits. It is usually possible simply to remove the CPU and replace it with a faster model. This is particularly easy if the socket is a zero insertion force (ZIF) socket.
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