CoinCraft A1 chips can be pushed up to 33GH/s as the Bitmine.ch site itself states. This will put put a board up to ~260GH/s making Sampo 1T go 1040GH/s- on the turbo mode the chips are set approximately at 31.5GH/s a piece. The power usage and board component temperatures start increasing rather fast as you get closer to the high end values. This is because you'll have to run the chips with higher voltage to keep avoiding hardware errors.
In short, there's room to push it higher but the advantage gained is questionable.