Reveal 387SX FPU 16-25MHz Advanced Math Coprocessor Cyrix 80387SX LCC68 RARE

As a Cyrix-made 387SX, it enhances floating-point performance in 386SX systems, enabling smoother CAD, engineering and spreadsheet computations. ✅ Rare Reveal 387SX math coprocessor. ✅ Boosts FPU tasks for legacy software.