I don't get more than that with my 270s, so I am interested to see if someone can offer up better config.
I get a little more with my 270x - 1,385khs. Brand is GIGABYTE GV-R927XOC-2GD Radeon R9 270X 2GB .

The top card is a cheap 6950 unlocked to 6970. It actually goes faster than the 270x!! More shaders.
Config (6950,270x,270x)
"gpu-threads" : "2,2,2",
"gpu-engine" : "850,1150,1150",
"gpu-memclock" : "1250,1500,1500",
"gpu-powertune" : "20,20,20",
"kernel" : "darkcoin",
"temp-target" : "75,65,65",
"temp-overheat" : "80,75,75",
"temp-cutoff" : "85,85,85",
"lookup-gap" : "2,2,2",
"thread-concurrency" : "8193,8193,8193",
"worksize" : "256,256,256",
"intensity" : "18,18,18"
I have undervolted cards (1.075) so i can't do any "wild" settings.
Is this for less watts? How much less? Thanks.