I have 5 cards running 600 Khash and 1 running 550.
I have 2 similar machines with 2 cards in each but with different results.
This screenshot is from one of them. As you can see the left card get's 50 Khash more than the other.

30 min later

I normally use GUIminer, but I pasted the command in to CGminer to get this screenshot.
cgminer.exe --scrypt -u 17HjaGvN64UD28NMigjBbu7Ru6kHy26TZi -p 12345 -o stratum+tcp://middlecoin.com:3333 --gpu-platform 0 -d 1 -w 256 -v 1 -I 20 -g 1 -l 1 -T --thread-concurrency 20992
cgminer.exe --scrypt -u 17HjaGvN64UD28NMigjBbu7Ru6kHy26TZi -p 12345 -o stratum+tcp://middlecoin.com:3333 --gpu-platform 0 -d 0 -w 256 -v 1 -I 18 -g 1 -l 1 -T --thread-concurrency 20992
Ps. I would love that lovely "green text" and showing both GPU's in 1 console, but I have been unable to get that result out of my CGminer. I both lack the program version and the command line.
Any help would be much appreciated