After I done my lunch when I came back to my computer, it was sleep mode.
When I wake it up my CPU speed increased to 5.92~5.98GHz and I don't know why.
So I started Cinebench for checking it is true or just a program bug and really my score go high.
But I restart my computer for check, My CPU speed stay at 4.7GHz that I set speed.
My setting was 47x 1.25V 68C' and Bug setting was 60x 1.25V 72C'
(My English is bad sorry.)