Check out the dual Nvidia Kepler GK104 based MARS III, featuring an unprecedented 8GB of GDDR5 memory and a triple-fan dual slot cooler as reported by vrzone:

ASUS's ROG MARS III is decked with the trademark red and black theme of their Rampage/Maximus motherboards, and uses a triple fan heatpiped cooler within double slot form factor, a welcome change from the obtuse three-slot of their DirectCU II cards from past. There are three 8-pin PCIe connectors (implying up to a whopping 525W of power draw potential) present on the board and a red button to activate 100% fan speed for overclocking. For display outputs we get a single mini-DP port and three DVI headers. Sadly, there is only a single SLi connector which limits things up to only 4-way GPU.

The project manager on-site told us that the board we are seeing is still an early engineering sample and that they will still be making some tweaks to its PCB and cooler design before shipping sometime later this year. Since its predecessor MARS II (dual GTX 580) was one of the most expensive and elusive cards ever, we won't be too surprised if the MARS III follows suit.