These are my settings guys
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer.exe -o stratum+tcp://sitehere:port -u user.1 -p pass --scrypt -I 20 -v 1 -w 256 -g 1 --thread-concurrency 32765 --gpu-fan 100 --temp-cutoff 99 --temp-overheat 95 --temp-target 90 --expiry 120 --gpu-threads 1
pause
not sure if they right but they work for me.