Indeed, the big flaws of laptops compared to a fixed tower is connecting multiple screens on this one unless it does not have a DisplayPort that allows to manage multiple video streams.
So I have a display connected to the HDMI port on my tablet and the second on the graphics card USB 3.0.
The result, it works perfectly and I have my extended desktop on 3 screens (one of my tablet and external 2).
However this solution does not seem appropriate when playing, but good as I do not play, it's perfect.
I allow myself to let that comment rather explicit in French, because in fact, there is very little information on this subject in France.
However despite the supplied adapter, I prefer simple as possible and I ordered a DVI cable / HDMI adapter to remove.