This unit only draws 24 watts at full operation, and my tests rate it at about 12 GFLOP/sec.  I am using it for power-efficient scientific computing, and it seems like a great little box.  I've got Windows 8.1 loaded on it - using an external USB DVD player it was able to boot up very easily.  I'm running on a 1920x1200 monitor, and it has good graphics for desktop uses - I don't know about games, since this is a (low power) workhorse for me.  The box is miniscule when I compare to my big desktop boxes - amazing.