need help for overclock to 4.4ghz ,4.6ghz and 4.8 ghz volt?

My specs are:

Mobo: Z97-G65
cpu: i5 4690k
cooler: Hydro Series™ H60
ram: 16GB hyper fury x 1866
psu: XFX TS Series 550W 80PLUS BRONZE

i need to overclock my PC for 4.4 or up to 4.8 if my spec gone.i not know volt and config for make its is my 1si time...