the usb3 cables on that unit passes out the back to connect to the rear usb3 ports of the motherboard. Most units do this as a usb3.o header on the motherboard is currently rare.
You're talking about the Ultra card reader, I presume.
The description on Tigerdirect website says: "A motherboard with built-in USB 3.0 and SATA connectors is required in order to operate the pass-through ports on this device".
From your comments, I assume it simply means I need an existing USB 3.0 port, and not a 3.0 header as I first tought.
So, if I buy a card with an internal USB port like this, it will work: http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=6587500
Or maybe this one could be better since it has 3x external USB and 1x internal, plus a built-in 4-pin power connector for extra power.http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=160540605614