PowerColor Devil 13 Dual Core R9 290X
http://hexus.net/tech/reviews/graphics/71425-powercolor-devil-13-dual-core-r9-290x/

http://hexus.net/tech/reviews/graphics/71425-powercolor-devil-13-dual-core-r9-290x/

You can't help but admire the extravagance, and we're impressed that PowerColor faced-up to the engineering challenges imposed by running two R9 290X GPUs on a single, air-cooled PCB. However, it goes without saying, this card is only suited to those willing to contend with the trade-offs applicable to ultra-extreme graphics hardware.
The Good
Is mighty fast
Looks formidable
Capable of gaming at 4K
Overclocked frame buffer
Bundled Razer Ouroboros mouse
The Bad
Huge three-slot design
Gets extremely hot and loud
Throttles when stressed
Costs more than an R9 295X2