I'm running 13.12 drivers, was there much of a difference between 13.12 and 14.6 beta or were you ever on 13.12?
I'll go ahead and give the config a try before I update drivers just to see.
sure there is a difference, roughly 30% increase in hashrate. you have to update your drivers to 14.6 or ask someone to provide you with the kernel bin files compiled by sgminer on machine running 14.6 drivers. then you can use these kernel bins on mining rig with 13.12 drivers and get almost the same hashrate as with 14.6 drivers