Optimizing Hashrate While Mining Litecoin With HD7850 GPU

I've been doing some Litecoin mining with my Sapphire HD7850.
Running windows 7 64 bit with a Phenom 4x CPU and 8 gigs of system ram.  Running cgminer with the following settings I have been able to consistently maintain 350 khash/s with good stability.

C:\cgminer\cgminer.exe --scrypt -o http://host.com:Port -u Name -p Pass  --thread-concurrency 8192 -I 17 -g 1 --gpu-engine 1050  --gpu-memclock 1300

If I am using the computer while I mine I change the intensity to 14 with the following settings, these will maintain 270 Khash/s without any noticeable screen lag.

C:\cgminer\cgminer.exe --scrypt -o http://host.com:Port -u Name -p Pass  --thread-concurrency 8192 -I 14 -g 1 --gpu-engine 1050  --gpu-memclock 1300

WARNING: The settings above will overclock your GPU core and memory clock.  Familiarize yourself with overclocking before attempting to use these settings.  Overclocking improperly can result in damage to your hardware and may void a product's warranty.