Fair enough, i was a bit too enthusiastic with my response. Mine is connected with a single usb cable too. So yes, it might not be as easy as a simple throughput.
http://accessories.us.dell.com/sna/p...n&sku=332-0446
Going by the description of the product you would assume it could handle an HD display with less problems. Especially since it's advertised as being able to connect two displays at once. I don't wanna know what it would do to my cpu if i would have 2 1920x1080 displays in extended setup...
And yes, i would accept a bit of slowdown. But i won't accept incompatibility with software or issues like persistent fps drops. Especially for the price they come at.