setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
C:\your\path\to\cgminer.exe --verbose --scrypt -o stratum+tcp://[mining_url] -u [workerusername] -p [workerpassword] --thread-concurrency 15232 -I 19 -g 1 -w 512 --gpu-fan 85 --lookup-gap 2 --gpu-engine 1130 --gpu-memclock 1500 --gpu-powertune 20 --failover-only -o stratum+tcp://[failover_url] -u [workerusername] -p [workerpassword]
1.I uninstalled all video card drivers
2. uninstalled catalyst
3.download both AMD sdk and latest catalyst and installed both
4. I once had a Nvidia card for a game I played I had to make sure all that stuff was gone! from the uninstall programs under control panel.
5. WOW it was over 500 at first but I took it to a lower intensity it got scary. I even took the memlock and and engine back to spec and still got 425 or so out of it. Now please keep in mind I looked for a few weeks and lots of reading to get that. I was lucky to get 250 to 350 out of it before. I ran those specs on 2 different rigs and the rigs mobo and cpu are different and got the sameish fast OMG outcome.
Please let me know how it worked.
If you are running windows take the visual effects down to performance settings Vrooom vroom