Bought this for the native usb3's and to reduce the power i was using. Had a old work station using 400 watts.I am down to 200 watts, with most of that being the 2 monitors. will replace them some day.the sleep mode for the first time in any computer I have ever had works great. When it goes to sleep on its own power usessage is under 40 watts, when told to go to sleep it use 0 watts. Do not know how that is possible, but move the mouse and it's back.