I have those two cards in one rig here is my bat file
setx GPU_MAX_ALLOC_PERCENT 100
cgminer.exe --gpu-platform 0 --scrypt -o stratum+tcp://stratum.give-me-ltc.com:3333 -u username -p password -I 20,19 --lookup-gap 2,2 --thread-concurrency 20480,10192 --worksize 256,256 --shaders 1792 --gpu-engine 1110,1110 --gpu-memclock 1500,1440 --expiry 1 --queue 0 --auto-fan --temp-target 82,79 --temp-hysteresis 2
with this setup I get 1050kh/s on average
btw why you typed in your settings username and password two times??
Thanks for the config, I'll have to try it out. I currently have both of them running together for 950KH/s. May I ask which card is the 7850? It's the one with intensity as 19, correct?
Thanks so much for the config! As for the username and password x2 thing, I thought it was needed for some reason, not sure why though.