If you mean config:
"intensity" : "20,20,20,20",
"worksize" : "256,256,256,256",
"kernel" : "groestlcoin,groestlcoin,groestlcoin,groestlcoin",
"lookup-gap" : "0",
"thread-concurrency" : "8192,8192,16448,16448",
"gpu-threads" : "1",
"gpu-engine" : "1100,1100,1050,1050",
"gpu-fan" : "30,30,30,30",
"gpu-memclock" : "1000,1000,1000,1000",
"gpu-powertune" : "20,20,20,20",
"temp-cutoff" : "95,95,95,95",
"temp-overheat" : "85,85,85,85",
"temp-target" : "75,75,75,75",
"api-mcast-port" : "4028",
"api-port" : "4028",
"expiry" : "28",
"failover-switch-delay" : "60",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "7",
"tcp-keepalive" : "30",
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/local/bin"
280x = 6,42 Mh/s
270s = 3,52 Mh/s
I can change intensity UP to 24, give me some hashrate power, but this is stable for me.
Memory and GPU is in max. on this voltage, anything above make me crash driver.