The Centaur/IDT Winchip processor is a unique x86 core developed by the Centaur division of IDT.

It's design is not about high clock speed, operations per clock, or a quick ramp up, but size and power use (and this heat dissipation). The chip came too late, however and the industry - for the most part - passed it by.

The only widely distributed device to use a Winchip AFAIK is the Netpliance i-Opener.

Via purchased IDT's Centuar division and is rumored to have engineers working on the next-generation Winchip cores.