One thing you may want to change is your core clock. I'd drop it to 1408 @ 900 mV or so. You're likely pulling more watts than necessary with 1590 @ 1100 mV on the core.
Also keep a close eye on your temps. May want to bump your min fan speed some.
Thanks a lot for answer. I tried to drop to 1408 @ 900mV, and i go down at 1960 H/s. This core clock setting was the only one way i finded to broke the 2000 H/s barrier. Temps are stable too, i will increase a little bit fan speed as you suggest it