Love the new updated windows binaries from Elun! Getting 2.2MH/s (up from 1.95) now with my 270's (x & non-x) with the following settings:
"gpu-threads" : "2",
"gpu-vddc": "1.150",
"gpu-fan" : "75-100",
"gpu-engine" : "1200",
"gpu-memclock" : "1500",
"gpu-powertune" : "20",
"kernel" : "x11mod",
"temp-target" : "75",
"temp-overheat" : "88",
"worksize" : "128",
"shaders" : "1280",
"thread-concurrency" : "5121",
"xintensity" : "512",
"lookup-gap": "2",
"vectors": "1"
Temps 60*C & lower (although I do have a 20" box fan under them)...
https://i.imgur.com/8d8omUu.png