You can think of it as an HD 3870 X2, it carries the exact features and specifications, except lower clock speeds and of course, a cheaper price tag. Newegg is selling it for $350.
As far as clock speeds go, it has a core clock speed of 670MHz vs. 825MHz, memory clock speed of 830MHz vs. 900MHz and shader clock speed of 670MHz vs. 825MHz.
I ran a couple of quick tests, one of which was 3DMark06, just to get something to report and see if the card was stable. I didn't have any issues with the card (at least so far before our full review) and the score seen above is pretty impressive. For comparison, a single HD 3870 card gets a score of about 10,400 while the HD 3870 X2 card pulls in 13,300 or so.
The estimated price on the ASUS EAH3850 X2 1GB card is $349 and it should be available starting sometime next week. That price tag places the card between the HD 3870 single-GPU cards (some of which have come out with 1GB of memory as well) and the dual-GPU HD 3870 X2s. This is indeed an area that AMD needs to address as they have no other GPU options for gamers in the $250-$350 range. Hopefully we'll see the HD 3850 X2 1GB models from more vendors causing a price drop closer to $300. But for now, we are eager to get a full allotment of time with this card and report our results! Check back soon!!