wmf parent
Yeah, IIRC VIA is using the same ring oscillator style that Intel used to use. This article is about a new, lower-power RNG design.
The idea that a hardware RNG would ever need to consume a noticeable amount of power on a 20W CPU seems strange to me. Lots of low power chips have them. A quick search returns a paper titled "A 2.92μW Hardware Random Number Generator".
Having a look at that paper, the actual rate at which it produces bits is very low - for 2.92μW, they're producing only 500 bits per second.
For an embedded device that might be suitable, but for a consumer or server machine you need a much higher bitrate.