I am running BAMT 1.2:
"intensity" : "13,
"vectors" : "1",
"worksize" : "256",
"kernel" : "script",
"lookup-gap" : "2",
"thread-concurrency" : "8192,
"gpu-engine" : "1020,
"gpu-fan" : "80",
"gpu-memclock" : "1500",
"gpu-powertune" : "20",
"temp-cutoff" : "90",
"api-mcast-port" : "4028",
"api-port" : "4028",
"api-listen" : true,
"api-allow" : "W:0/0",
"expiry" : "12",
"gpu-dyninterval": "7",
"gpu-threads" : "2",
"log" : "5",
"no-pool-disable" : true,
"queue" : "0",
"scan-time" : "3",
"scrypt" : true
}
Try those settings.