This air-cooled video card reportedly has 3584 stream processors, down from the 4096 offered by the full Fury X. Besides the cooling solution, that is believed to be the main difference between the two cards. The Radeon R9 Fury has a 1050MHz core clockspeed and 4GB HBM clocked at 1000MHz effective, similar to the Fury X.
The biggest difference between the Fury and Fury X is that the Fury is air-cooled, with AIB partners able to put on their respective coolers onto the card. The other big difference is that the Fiji PRO GPU is what is powering the Fury, with 512 less Stream Processors. We shouldn't expect performance to be that much less, probably 10-15% less than Fury X. But, without that huge radiator and pump, we're going to have an impressive card to combat the GeForce GTX 980 and GTX 980 Ti.
While the Radeon R9 Fury X runs at around 50°C or so thanks to its watercooling, the Fury will run closer to 75°C. Cards are expected to ship in the coming weeks.