A E7200 or E8400 works as a nice Atom substitute.This article covered that fairly decently though they didn't optimize it's efficiency completely they could have gone further with undervolting and underclocking. They could have underclocked it to the same clock speed of the Atom and undervolted it as low as possible or to the same voltage as the Atom. Also a E8200 would have been better in theory due to the 6MB cache.http://www.tomshardware.com/reviews/intel-atom-efficiency,2069.htmlHere's a example of how low you can undervolt/underclock a E7200 my Gigabyte motherboard monitoring tool says it consumes between 3 to 4Watts though I don't believe that is factoring in the board chipset which is also undervolted.just don't hit refresh after submitting a comment. Hitting refresh simply re-submits the comment and you end up with a double post.As far as a low power downloader... Just slap together a cheap Atom based server. Throw a few HDDs on there and a copy of linux and just leave it on and downloading all day and night. Atom takes very little power, and is sitll more than powerful enough to download an internet stream and serve up content to the network.