First of all, I assume you're using the default Phatk kernel in CGMiner. Switch to Diablo.
When you say "I will not mine past 12," I don't get what you're saying. 12 intensity? Mine anywhere from 9-14 with these. I mine at 9 on two Gigabyte 7870OCs, and 14 on an MSI 7870.
Don't listen to him. It sounds like you're mining LTC, which all of his settings are for BTC. You really ought to specify that either in the title, or your post somewhere.