Here's my batfile :
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer -o stratum+tcp://stratum.wemineftc.com:4444 -u maursader.1 -p x --scrypt --gpu-engine 1075 --gpu-memclock 1485 --thread-concurrency 8192 -I 13 -g 2 -w 256 --lookup-gap 2 --no-submit-stale --auto-fan
742.2khash/sec , could push it to over 750 if i wanted to, but it's too hot here atm

Current temp : 74°
Thank you for the suggestion, here are the results:
http://puu.sh/3CWB4.pngRun this
cgminer --scrypt -o stratum+tcp://stratum.wemineftc.com:4444 -u maursader.1 -p x --intensity 13 --worksize 256 --thread-concurrency 8192 -g 2 --gpu-engine 1051 --gpu-memclock 1722 --auto-fan
This caused the computer to lock up, lol.
I wonder if it's got anything to do with the thread concurrencies, and I only say this because when I run cgminer by itself, it tends to choose 22400 for the value.
Any thoughts on that?
I would suggest to set all the values for each card separated. even if they are the same cards with the same gpu it might be due to some manufacturing tolerances that they react different on the settings. Than you can try to find out which settings suits each card.
I had such an issue in the past with 2 x HD5770. they where in need of different settings in terms of CPU and memclock