You don't see too many graphics cards that combine a standard heat sink with a water block. One of the most recent companies to take this is approach is Asus, which offered up a sneak peek of its upcoming GeForce GTX 770 Poseidon graphics card under its Rebublic of Gamers (ROG) brand. It features the firm's new DirectCU H2O design which can be used in a standard air or liquid cooled setup, offering gamers a bit of flexibility as their rigs change over time.
According to Asus, the card runs up to 31 degrees cooler when liquid cooled, so if you have the setup to feed Poseidon a constant flow of coolant, by all means, take advantage of the additional cooling potential.
The card showed up at Computex 2013, though since then, Asus has kept relatively quiet about its new part. According to Swedish-language website sweclockers.com, the card will be in the hands of dealers starting September of this year. We can hardly wait.