I am running a Vapor-X. The maximum I can get out are 760 kh/s at 1095 MHz core and 1500 MHz mem, drawing 266 watt out of the wall.
As energy costs a fortune in my country I have optimized it not for max hashing but for the best energy efficiency. I am running the card at 975 MHz core and 1250 MHz mem. In this setup I get 680 kh/s and the card draws 190 watt.