It was only a matter of time before this happened: PowerColor has shoehorned two HD 6970s onto a single PCB (ridiculously large heatsink included). Also on show was a more reasonably sized HD 6870 X2. Look inside for pictures and specifications. (Updated with HD 6870 X2 pricing)
(Updated with HD 6870 X2 pricing – scroll to the bottom.)
Sitting inconspicuously in PowerColor's booth, flanked by many more mundane models, were two suspiciously big cards…
Turns out, these are actually the HD 6970 X2 and HD 6870 X2.
PowerColor HD 6970 X2 4GB (2GB x 2) (Core: 880MHz, Memory: 1375MHz)
If you remember, the HD 6990 had a 'performance mode' switch to bring the core clock up to 880MHz to match the HD 6970. The PowerColor HD 6970 X2 makes that mode permanent, not to mention bringing the memory speed up to 1375MHz.
There are three 8-pin power connectors on this monstrosity and two pretty large fans to cool the whole thing. Many heatpipes can be seen underneath. Looks like the Asus Mars II has a challenger on its hands for the title of biggest, baddest graphics card…
There was also a live demo setup with two of these triple-slot behemoths inside. Pricing and release date for the HD 6970 X2 are unknown, but PowerColor says the card itself is already nearly finalized so it should come quite soon after the HD 6870 X2.
PowerColor HD 6870 X2 2GB (1GB x 2) (Core: 900MHz, Memory: 1050MHz)
While PowerColor was doing the whole make-your-own-X2 thing, they probably decided that they should also have a HD 6870 X2. Like the HD 6970 X2, this card is exactly the HD 6870 times two. However, PowerColor managed to make the thing a double-slot affair, albeit a very long one. Both cards have 2 x DVI, 1 x HDMI and 2 x mini-DP outputs.
The HD 6870 X2 will be priced at US$449 and be released sometime in Q3. PowerColor says that its performance will beat the GTX 580 by 30%, which seems about right given the performance of two HD 6870s in CrossFire. If this is true, the HD 6870 X2 will give the GTX 580 (which costs ~US$50 more) a run for its money and will also be slightly cheaper than buying two HD 6870s.