I am running the r9 290 Powercolor, stable. Here are my settings.
"intensity" : "18",
"vectors" : "1",
"thread-concurrency" : "35960",
"worksize" : "256",
"lookup-gap" : "2",
"auto-fan" : true,
"gpu-engine" : "941",
"gpu-memclock" : "1250",
"gpu-powertune" : "20",
"sharethreads" : "48",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"hotplug" : "5",
"log" : "5",
"no-pool-disable" : true,
"temp-cutoff" : "97",
"temp-overheat" : "88",
"temp-target" : "74",
"temp-hysteresis" : "3",
"queue" : "1",
"scan-time" : "60",
"scrypt" : true
I can't get my TC higher than 27400 without causing my GPU to shut down in sgminer. Even though I have 12 gigs of ram