Follow this toturial, My CPU (Xeon E3-1230 v3 / Haswell ) got "8 28 29 30 31 32 (33) 34 35 36 37", but only 8/33/35/36/37 are real effective according Intel Power Gadget log, and frequency always stay higher than 3GHz on Intel Power Gadget, in the same time Power was OK.
Booter: Clover R4297...