Despite the fact that a Radeon 5870 X2 card is listed by a Dutch e-tailer, we can confirm that there is no such card, at least not yet.
ATI doesn’t have a new RV770 successor and we are not aware of such a brand for any ATI based upcoming product. It looks like these guys want to get some media attention and sell some other cards based on this coverage, and they traditionally like to get the news out and have listed Phenom II Quad 805, 810 and Three core 710 and 720.
Unfortunately, this time there won’t be this card and as far as we know RV740 is the first 40nm card that should launch at some point in early Q2 2009 and RV770 40nm successor is definitely later than that.
You can check out the listing here.
Update: As we could expect the "card" is removed from the etail shop and how it says that our link is dead, but the smart marketing chaps do surprisingly Radeon HD 4870 X2 from Asus listed there.