I purchased one of these about a month ago and never got it close the hash rate being reported @
https://litecoin.info/Mining_hardware_comparison . There, with the same model #, shows a hash rate of 752 kh/s. The absolute
best I've been able to get from mine is 582 kh/s, though not stable. I thought maybe I had a bad card, and either way,
decided to add 3 more to the mix. Currently, they are all averaging around 535 kh/s. Not sure where I've went wrong here.
I've tried a lot of tweaking, changing nearly every variable. Below is the cgminer command line:
C:\cg\cgminer.exe --scrypt -o stratum+tcp://pool1.us.multipool.us:7777 -u username -p password --thread-concurrency 22400 -g
1 -I 13 -w 256 --auto-fan --gpu-fan 30-75 --temp-cutoff 90 --temp-overheat 85 --temp-target 72 --gpu-powertune 20 --expiry 1
--scan-time 1 --queue 0 --no-submit-stale