EK seems to be launching a new liquid cooling product every month now, sometime more than one at a time even. One of the two newest is the EK-FC660 GTX.
This isn't the same type of cooler as the EK-FB ASUS C5F-Z, which goes on the ASUS Crosshair V Formula(-Z) motherboard.
Instead, it is more like the EK-FC7990, in that it goes on a video card.
The name EK-FC660 GTX makes it fairly clear which graphics card that is: NVIDIA's GeForce GTX 660 series (GK106 based).
In addition to the graphics processing unit, the VRM is cooled (voltage regulator module).
EK gave its waterblock a very high flow design, allowing it to be used with weaker-than-usual water pumps. Screw-in brass standoffs make installation easy.
Up to four EK-FC660 GTX series waterblocks can be linked with EK-FC Bridge & Link system. The price is 80.95 Euro / $80.95-106.46 dollars.
EK's Other New Waterblock Is for NVIDIA GeForce GTX 660 Graphics Cards
Called EK-FC660 GTX, it is the latest in an ever-growing line
EK-FC660 GTX (4 Images)
... so hot right now