If you look closely, you can see what Fudo was saying, it is two boards on a single card, and each pair takes up only a single 16x slot. This is really bright, you can do the qSLI with almost any existing x16 mobo, no need for upgrades. Then again, if you can afford two of these monsters, well, let's just say spending $150 more on a new mobo won't be much of a disincentive.
The other interesting part is that the boards are in a father/daughter config, with the 'father' plugging into the slot. The SLI bridges also connect the father to the father and the daughter to the daughter. There is probably some very interesting math that goes on in the background, but it all ends up in a single image at the end. µ
Sign up for INQbot – a weekly roundup of the best from the INQ