i have these http://www.sapphiretech.com/presentation/downloads/?pid=1020&psn=0006&lid=1&os=12    I have 2 of them and im getting 500Kh/s each with Cgminer 3.7.2

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer.exe --scrypt -s 5 -o SERVER:port -u USERNAME -p PASSWORD -I 19,19 -d 0,1 -w 256 -v 2 -g 1  --thread-concurrency 8000,8000 --gpu-engine 930,930 --gpu-memclock 1400,1400 --gpu-powertune 20,20 --auto-fan --gpu-fan 40-80 --temp-target 79 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale


 GPU 0:  77.0C 3751RPM | 500.1K/499.9Kh/s | R:1.3% HW:0 WU: 459.0/m T:1 I:19