My 280xs are Hynix and I'm only getting around 280kh/s on neoscrypt. Can someone check my config?

{
"pools": [
{
"name": "",
"url": "",
"user": "",
"pass": "",
"nfactor": "10",
"worksize": "64,64",
"algorithm": "neoscrypt",
"gpu-engine": "1100,1100",
"gpu-powertune": "20,20",
"thread-concurrency": "8192,8192",
"gpu-threads": "2,2",
"intensity": "13,13"
}

],
"failover-only": true,
"failover-switch-delay": "60",
"lookup-gap": "2,2",
"vectors": "1,1",
"gpu-fan": "50,50"
}