djaychela: Finally figured it out. Ok, Using the following conf file in conjunction with VertiKev https://bitcointalk.org/index.php?topic=466867.0  .......  I have found success. My dual HD6970's are pushing 420kh/s. Now, I launch w RI of 10240, but push it to 20480. GPU0 69C and GPU1 74C (this card always runs hot, dam XFX crap. Hope this helps. The key was ThreadConcurrency. Halve your normal TC, delete shaders. If you need shaders in then match it to your TC +or- 1
Hope this helps.
...and remember to delete your *.bin file(s) before launching the new *.bat or conf file.....cheers

Ed4252    TC is probably the issue you are having as well. So halve it.
,
"rawintensity" : "10240",
"scrypt-vert" : true,
"vectors" : "1",
"worksize" : "256",
"lookup-gap" : "2",
"gpu-engine" : "950",
"gpu-memclock" : "1365",
"thread-concurrency" : "7520",
"gpu-fan" : "30-85, 30-100",
"temp-target" : "70,75",
"temp-cutoff" : "85",
"auto-fan" : true,
"api-listen" : true,
"api-port" : "4028",
"expiry" : "15",
"gpu-dyninterval" : "7",
"gpu-threads" : "1",
"hotplug" : "0",
"log" : "5",
"no-pool-disable" : true,
"failover-only" : true,
"queue" : "2",
"scan-time" : "5",
"temp-hysteresis" : "3",
"device" : "0-1"
}