I have a Zotac ZBOX, which has been a wonderful little device. The Dual-core Atom within is not the most powerful of processors but the Ion graphics chip more than makes up for the CPU’s shortcomings. XBMC Live 10.0 runs on the machine and really maximizes the machine’s capabilities. A while back I ran some tests to see how much the CPU was being used during various tasks.
First up is when XBMC is on the main menu. I use the default skin, Confluence.
You should note the Atom never touched 40% utilization. The Atom/Ion pairing makes for a very efficient combination for a media player.