Hi Xlack - I am assuming you refer to three or more monitor eyefinity with the 6970 in your sig. I am also assuming that your particular 6970 uses miniDP and not regular-size DP.
That USB vga card would not work for eyefinity. You could probably use it to give you three monitors in windows desktop but I wouldn't recommend it.
For a miniDP this is what you need for eyefinity if you are in Canada: http://www.amazon.ca/Accell-B101b-002b-Ultraav-Displayport-Adapter/dp/B0041O7XHY/ref=sr_1_1?ie=UTF8&qid=1330117105&sr=8-1
If you look at the below-linked AMD eyefinity validated dongle page you will see the Accell B101b-002b is listed as a validated ACTIVE miniDP -> VGA adapter despite Amazon not specifically saying it is active in their listing. See: http://support.amd.com/us/eyefinity/Pages/eyefinity-dongles.aspx