That looks like a good addon. I found a similar one that goes into a mini PCI slot (usually wireless network card connection), and converts it into 2 USB 3.0 ports. It would be a good addon for my desktop, just to improve backup speeds. Here it is.
http://www.provantage.com/startech-m...2~7STR9254.htm
I don't need the built in wireless on my desktop, as it's the "G" type, and I have a few of the USB "N" type adapters laying around that's a lot faster.
That's shaping up to be a decent computer you're building there, 945. Hopefully it will serve you well.
Cat