You’re going to be seeing a lot of different versions of the Radeon R9 290X, using custom designed cooling solutions to cope with the immense amount of heat they put out. One of the more interesting options is sure to be the PowerColor LCS R9 290X 4GB GDDR5(BF4 Edition)
The LCS 290X is designed to be used with your own liquid cooling system – it doesn’t come with the cooling equipment, only the heatsink and some clamps. It fits 3/8″ and 1/2″ rigs, and comes clocked at 1060 MHz peak load, but I’m sure that will depend on what kind of cooler you connect it to. They say that under full load, it only reaches 60 Celsius. The memory will be clocked at 1350 MHz, and it comes with a copy of Battlefield 4.
For more details, check out Power Color’s product page.