read this, it should help you get a better understanding of ocing. Though it says 680 and the 700 series board it applies to most mobos as well. This guide just has more settings. The one nice thing about the 630 is that it is for newbies to OCing. Since i'm not a hardcore gamer the 630 fits the bill for me.
Anyways, when adjusting voltages of one component you don't have to adjust the others unless needed.
Usually, you set the FSB and see if you post if not then try upping the CPU voltage a little till you do post.
Each time a successful launch of windows run stress test software like, Prime95 or OCCT for 2+ hours.
Don't go over the recommended CPU voltage though. Once you get close to that number start upping the other voltages and see if you can get stable.
For me i have a q6600 (only because i heard it overclocks real nicely, i've hit 3.2 from a 2.4 stock) and i have my voltages at 1.45.