Ok, my S9 start working a bit better.

Most important thing was set fan manualy at 90%. After this at 650Mhz get 13TH+ but with quite a lot HW errors (0,0015%). After lower frequency to 625Mh HW drop to 0.0003% and speed stabilized at 13,1TH.
Strange thing is that miner need few restarts to hashig properly, sometimes 1 board hang at 3TH and dont want speed up.