This thread discusses the Content article:
ATi vs. nVIDIA: Video Transcoding
Is there an Avivo CPU usage chart? I have read elsewhere that it is very near 100% but the review makes it sound like it will be similar to Badaboom. In that review it was also mentioned that with the 100% CPU utlization Avivo was very reliant on the CPU and that using a slower more common "everyman" CPU may provide very different transcoding speeds.