The radiator isn't mounted on the end of the card, it has to be as per the 295x2,
Why does it have to be ?
That is my suggestion, I'm not suggesting that is the way it is mounted, I was just giving an alternative.
And to anyone commenting on how bad an idea this is, just think about it, all the benefits of an AIO system without the need to find space for a radiator.
Unless you have the fan on the radiator mounted on the back of the case as an intake fan, it is still drawing the warm air from inside the case to the out side. My idea to put the radiator and fan on the end of the card wouldn't be that much different than any of currant custom cooled cards, but probably with better results.