I'm getting such 130kHs with win8/cgminer/one R9 290x and that very config

"intensity" : "11",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"lookup-gap" : "0",
"thread-concurrency" : "4096",
"shaders" : "2816",
"gpu-engine" : "0",
"gpu-fan" : "0-50",
"gpu-memclock" : "0",
"gpu-memdiff" : "0",
"gpu-powertune" : "30",
"gpu-vddc" : "0.000",
"temp-cutoff" : "95",
"temp-overheat" : "90",
"temp-target" : "85",
"api-mcast-port" : "4028",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"hotplug" : "5",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "30",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/local/bin"

Do someone know what could be Wow! tweaked to get much much kH/s  ??