USB 3.0 not working at full speed on Windows 8

slow usb 3.0?
Try turning off suspend USB Power Saving Feature and ensure you have updated drivers. This fixed the problem for me, i went from 60MB/s to 170MB/s

less info here
http://superuser.com/questions/730531/usb-3-0-not-working-at-full-speed-on-windows-8/730548