Looks like its faster than 780Ti SLI
Link
Maybe faster VRAM and better CF drivers?
That looks really shady.
I can't think of a single dual-GPU card that's EVER been faster than a quality CF/SLI setup of contemporary cards :
Eg : Radeon 6990 was slower than CF 6970OC, GTX690 was slower than 2X 680OC cards, etc.
Dual-GPU cards honestly suck, unless you :
Have a SFF case or a single PCIe slot to work with
or
Have a need for quad-GPU and only two PCIe slots to work with
For everyone else, they're MUCH better off with separate cards. If anyone told you they'd rather than a 295 in comparison to a quality 290X aftermarket CF rig, they're trolling, or stupid, or both (unless they meet the exemption above).
It's also nice to have a spare card down the line in case you want to sell one, repurpose the other, one dies, whatever.
The first dual-GPU card I think I had was a weird SLI on a card Voodoo1 that I got from an Id employee in 96 or so. The next one was a Rage 128 something or other (or similar, it's been too long), and it was almost unusably terrible.