Scrypt settings for 7950 that i find stable using BAMT.
"auto-fan" : true,
"auto-gpu" : true,
"temp-cutoff" : "88",
"temp-overheat" : "84",
"temp-target" : "75",
"gpu-fan" : "40-100",
"intensity" : "20",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"lookup-gap" : "2",
"thread-concurrency" : "22272",
"shaders" : "0",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"gpu-engine" : "1040",
"gpu-memclock" : "1500",
"gpu-powertune" : "10",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "60",
"scrypt" : true,
"shares" : "0",
"kernel-path" : "/usr/local/bin"