PowerColor's 'LCS HD7970' Loves to Play with Water
The waterblock comes pre-fitted with high-flow 3/8-inch and 1/2-inch fittings (barbs) with captured O-rings to prevent leaking. As for the card itself, PowerColor took the liberty of overclocking the GPU to 1050MHz (up from 925MHz reference) and the 3GB of GDDR5 memory to 1425MHz (up from 1375MHz reference).
No word on when it will ship or for how much. As a point of reference, PowerColor's standard HD 7970 streets for about $660.