I've been dabbling with re-purposing second-hand thin clients for years (NSLU, various Wyse, Neoware and HP clients). My current favourite is HP t520 (dual cor

I've been dabbling with re-purposing second-hand thin clients for years (NSLU, various Wyse, Neoware and HP clients). My current favourite is HP t520 (dual core AMD embedded apu, fanless, M2 SSD drive, a miniPCIe slot, gbit ethernet, USB 3.0 and low power consumption). I haven't measured it but HP states 7W for normal operation. More info at http://www.parkytowers.me.uk/thin/hp/t520/ http://www.parkytowers.me.uk/thin/hp/t520/ & in the quick specs www8.hp.com/h20195/v2/GetPDF.aspx/c04303956.pdf You can have one second-hand for about $60-70, and prices are bound to go down. edit: the linked article mentions that mini-pcie can be used for an SSD. This is usually not true, as mSATA while sharing the same physical connector needs to be wired differently. You can see e.g. pcengines doing that on their apu2 boards. Even the aliexpress page mentions "NOTE:this is msata , can not use in mini pcie or wifi interface" in bold red letters