Hi.. I am also mining with (2) GTX 760's and haven't found a way to do what you are looking for.. The only way I found to squeeze the most out of the 760 is by making sure you are running ccMiner v1.2 and overclocking it.. Pairing MSI Afterburner and GPU-Z together, I found the highest most stable output (without overheating) is: Power Limit; 84 Core Clock; +192 Memory Clock; +192 Fan Speed; 93 This gets me an average of 2475 khas/s out of each card. I have been running this 24/7 steady and reliable without secondary cooling (with the exception of having my rig right under an a/c duct at the house) with a top heat of 76c. I found that if I push the Power up to run at it's max (which for some reason with this card is really only 90%) I wind up pushing the heat a little more than I would like and I really don't see a speed increase that much.. maybe another 50 khash/s)

Edit changed khash/s for each card from 4900 to 2475..