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Pretty much like the VIA Cyrix III 466 but with 100MHz FSB instead of 133MHz.

The Cyrix 600 is somewhat newer and VIA already decided to use a big VIA logo and a small Cyrix logo. The 466 has it opposite! > Read more

By the time these CPU's came out VIA already acquired both Cyrix and IDT (Centaur). Pre-release versions of the Cyrix III are based upon the Joshua core with 22 million transistors. The Joshua core is a Cyrix design with a PR-rating and the same slow floating point unit FPU as the older Cyrix CPU's.

VIA probably didn't like the Cyrix design and went for the Samuel core which is designed by IDT (Centaur). In reality terms this would have been the WinChip 4 and used only 11 million transistors. The design was cheaper to built. Because the Cyrix III doesn't have L2-cache the 'die' (core) of the chip is a lot smaller.

Because the Cyrix III didn't have Cyrix technology, VIA decided to rename the chip to VIA C3 after a while. > Read more