Aqua Computer, which you might have guessed is a water cooling component manufacturer, has announced a new water block for AMD's almighty Radeon R9 295X2 graphics card. This block will be known as the Kryographics Vesuvius.
This water block is probably one of the biggest water blocks out there. It spans the entire length of the card and covers every heat-source on it. As such, both GPUs are covered, all the memory is covered, the VRM circuitry is covered, and the PCIe bridge adapter is covered.
The paths for the water flow are not in series but rather in parallel. Both of the paths have been built to provide equal resistance, meaning that an equal amount of water will flow over each of the GPUs and that one of the GPUs won't suffer higher temperatures due to heat from the other GPU flowing over it. Mounting fittings to it should be a snap due to support for standard G1/4" fittings.
Aqua Computer has made a standard bare copper version available, as well as a nickel-plated copper version. They'll cost €169.90 and €184.90, respectively. Backplates are coming in May.