r9 280 x
{
    "pools": [
        {
      "poolname" : "whirl",
      "url" : "stratum+tcp://whirl.suprnova.cc:7000",
      "user": "x",
      "pass": "x"
        },

        {
      "poolname" : "nist",
      "url" : "x",
      "user": "x",
      "pass": "x"
        }   
]
,
"kernel" : "whirlpool",
"api-listen" : true,
"api-port" : "4028",
"shaders" : "2560",
"expiry" : "120",
"log" : "5",
"queue" : "1",
"scan-time" : "30",
"gpu-threads" : "2",
"gpu-engine" : "950",
"gpu-fan" : "0-40",
"auto-fan" : true,
"gpu-memclock" : "1000",
"intensity" : "20",
"vectors" : "1",
"worksize" : "256",
"lookup-gap" : "2",
"temp-cutoff" : "95",
"temp-overheat" : "85",
"temp-target" : "66",
"thread-concurrency" : "8192"
}




You can increase gpu engine and memclock