It was the first chip to use clock doubling , whereby the processor runs two internal logic clock cycles per external bus cycle .
The i486DX2 was nearly identical to the i486DX , but it had additional clock multiplier circuitry .
i486DX2 was the first i486DX2 to use clock doubling , whereby the processor runs two internal logic clock cycles per external bus cycle .
The i486DX2 was nearly identical to the i486DX , but it had additional clock multiplier circuitry .