I'm running at 240v, can never get to 1.4. Zvisha looked at my logs and told me 1.3 is the best I'm going to get with my unit.
Oh, I see. I guess I got a "lucky" May batch unit then... when I first got it, I never saw anything over 1.3, but with the restriction lifted for the 110V power, and the 1.5.2 firmware, mine now hashes at just about 1.4 (usually cycles between 1.39 and 1.41).