OC Newb Wants to OC E8400 Wolfdale

[Nadger]

So the last time I Overclocked was an AMD K6-2 from 350 mhz to 400.

 

Im bottlenecking on my CPU atm with my current build and id like to push the processor just a little more.

 

Heres my specs:

 

CPU: Intel Core 2 Duo E8400 Wolfdale 3.0GHz 6MB L2 Cache

CPU Cooler: Zalman CNPS9700 LED

Motherboard: GIGABYTE GA-X48-DS4 Intel X48

RAM: G.Skill 4gb (2x 2gb) DDR2 1066

Case: Aerocool ExtremeEngine 3T

PSU: Seasonic M12 700W

Video Card: XFX 5850 Radeon HD 1GB

 

I built this this to OC a little over 2 years ago but never felt the need to OC since it ran everything fine. Recently I bought a new video card cause my old one died. Now im starting to notice the CPU bottlenecking it.

 

What are some good settings to start at? I dont want an aggressive OC just something light for now. maybe 3.5ghz.

 

Should I be OCing the bus speed, or the multiplier or both?

Do i need to worry about the voltage to the CPU, what setting should it be at?

Do i need to OC the ram too?

 

Im clueless here so if you could help me get started that would be great.