Help overclocking i5 z97 asrock anniversary

[iceclock]

Got nzxt 440

I5 4690k

Asrock z97 anniversary

8 gigs of ddr3 1866mhz

750 watt evga supernova

Raiijintek termis evo cooler

2tb Seagate hd

29o Radeon club3d

Need to know if I can safely overclock on 4+2 phases versus 8 on oc models ty