Graphics cards that come liquid-cooled out of the box are great. So are custom-CNC'd full-coverage waterblocks from companies like EK. However, sometimes a gerbil decides to water-cool a card only to find no one makes a waterblock for it. NZXT's original Kraken G10 bracket allowed users to bolt an all-in-one liquid cooler designed for a CPU onto a variety of graphics cards. The company now promises that the latest Kraken G12 model is easier to install than its predecessor and offers broader compatibility with AIOs from several different vendors.
Besides the slot for a GPU cooler, the Kraken G12 comes with an integrated 92-mm fan to provide air circulation for other components like memory chips and VRMs that tend to operate at higher temperatures than even the GPU core. NZXT says this fan is compatible with aftermarket VRM heatsinks.
The official card compatibility list includes AMD graphics cards going all the way back to the Radeon HD 5870 from 2009 and the Nvidia's GeForce GTX 570 from the end of 2010. Most of the supported cards are from enthusiast-grade lineups, so look carefully at the list before buying one to strap onto that high-power Radeon 6450 or GeForce GT 710. As for the AIO coolers, 30 different models from Antec, Corsair, NZXT, Thermaltake, and Zalman are mentioned by name. Given the amount of rebranding in the AIO cooler space, many other units will likely work.
NZXT says the Kraken G12 will be available before the end of April with matte black or matte white finishes for $30.