If it is indeed 650Mh/s @ <1000W then I will be making a business trip to Asia this spring.
Scary/Exciting times.
It will be less than half that. The math is straightforward: ethash requires 8 gigabytes/s of memory bandwidth per megahash. Add up the number of DDR-3 chips in the miner (18 x 32 = 576), and even if they are overclocking 16-bit wide DDR3-1866, the total speed will be less than 300Mh.