Intel 487SX Math Coprocessor

Intel 487SX Math Coprocessor

Released in the early 1990s as a math coprocessor for personal computers, the Intel 487SX provided the missing floating-point unit (FPU) for the 486SX microprocessor. In actuality, the 487SX is a version of the much more expensive and functional Intel 486DX processor outfitted with an extra pin so that it fits into the coprocessor socket.