UMC U5SX against Intel 486SX-25

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UMC U5SX 486-33 and Intel A80486SX-25

I own an UMC processor with 33MHz (U5SX 486-33) and an Intel A80486SX-25 with 25MHz speed. For this test the UMC processor rans only with 25MHz. The exact setup is described in the LibreOffice spreadsheet.

Performance UMC U5SX in comparison to Intel A80486SX-25

I measured a 11.3% lead of the UMC processor in the Dhrystone-test. Intel claimed UMC infringed its patents but the Taiwanese engineers understood the system and made a good job. No wonder that Intel got cold feet and fought against UMC...


falk.richter*at*yandex.com
Last update: February 17, 2020