NVIDIA's GeForce GTX Titan high-end graphics card takes up two PCI Express slots, normally, like most top-tier adapters do.
There are ways to change that though, mostly by using a waterblock instead of the normal air cooler.
EK has already released one. Now, we have Aqua Computer launching a similar item.
Part of the Kryographics series (full name Kryographics GTX Titan), it covers the GPU, RAM chips and voltage regulators.
The top is made of stainless steel and has a laser-engraved logo. The base plate can be made of copper or nickel-plated copper.
In both cases, a Plexiglas top surrounded by a stainless steel frame is included.
Orders are already possible for the one with copper base and steel top, for 89.90 Euro / $89.90-117.21. The other variants will be available by the middle of March 2013. Their prices aren't known yet.