We don't have any significant stale shares percentage. ) Try your rig without overclocking, then add some offset to core clock and memory clock to find your own "sweet point".

2all: I have just switched from NebuTech 3.3 miner to bminer 9.0.0. Now my 6x1070 rig gives 4700 H/s instead of 3000 H/s before. That's a great difference...