Datapath ImageDP4 User Manual page 13

The Windows desktop should appear on the four screens attached to the first card as it did after the
display driver had been installed for the first ImageDP4 card.
You need to install the display driver again. This time you should specify the number of screens you wish
to use.
Restart the machine.
The Windows desktop should now be spread across the number of screens you specified.
DisplayPort Outputs
The Datapath ImageDP4 has four DisplayPort conectors which allow full size, locking cables capable of
driving next generations displays. When used in conjunction with the Datapath DPextend modules
(powered via the ImageDP4) cable lengths of up to 30m can be achieved.
The ImageDP4 outputs are numbered as follows:
13