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.
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