1) On a W7 Starter netbook without this adapter HDMI Port allowed me to redirect the display to an HDMI display: works great 2) On a PC tower W7 premium I could add a second display and extend my windows desktop onto two HDMI monitors: it works but against the videos playback on the monitor connected to the adapter is slightly jerky. But I guess it is normal because my tower has no USB 3 (flow rate of 5000 Mbit / s) and I plugged in a USB 2 (flow rate of 480 Mbit / s) at a much lower rate. The pub adapter speaks well of "normal" functioning USB 3.
