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You'd need that cable in addition to the Matrox DualHead2Go..

Do you really need the DualHead2Go? I was under the impression that you could just hook this up and connect the other 2 external displays with DVI connectors(unless you have a 30").
 
From what I know, the Dual Link DVI isn't actually 2 seperate DVI ports but is in fact a special DVI port to enable the use of the 30" ACD's.
 
From what I know, the Dual Link DVI isn't actually 2 seperate DVI ports but is in fact a special DVI port to enable the use of the 30" ACD's.

No it's just the miniDP to Dual Link DVI adapter which is able to drive up to WQXGA/WQUXGA aka 2560x1600@60 or 3840x2400@33.
 
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