As other comments have said, some (possibly most) of these chips likely have a core disabled because of manufacturing issues, so it's probably not a good idea..

As other comments have said, some (possibly most) of these chips likely have a core disabled because of manufacturing issues, so it's probably not a good idea... Apart from power usage (which the AppleTV doesn't have to worry about, being plugged into AC) there really isn't much reason to do it otherwise.