We wrote a few times about this card. It is supposed to work at 500MHz core and is meant to be significantly smaller than a massive 7900 GTX card. The memory works at 1200MHz and you need a 550W PSU to make it work. I suggest that you need even more than that to make those two cards with a total four chips on four PCBs work.
We can't confirm pricing but we caan suggest thaat it should be around 700 to 750 for a single card. The link to the picture is here.
We expect to see some of those cards shortly but Nvidia is still waiting for something to make those cards really public domain. ยต