I decremented one which I could go lower to 2100 and will be monitoring the invalid shares how they will behave,unfortunately I can only go lower to one card,need to restart PC to change settings of the other card which I am not going to do,I am happy with the stability of the miner,since I have suffered a lot from instability of all other miners the only thing I truly care is to find finally one miner that is stable and does not crash.