That is not a suitable gaming device.
It can handle presentations and that sort of thing, but can't handle the stresses of gaming especially 3 high resolution displays.
If you are running 3 screens with an SLI rig, then just connect one monitor to one GPU and two to the other.
Those sites look ok, but the toolsappliances one seems to have website issues. You know, you can check any vendor via http://www.bbb.org.