How much of a boost we talking here?

[Pepsiboy700]

What kind of performance increases can I see from running my cpu at 2500mhz and ram at 250mhz to running the cpu at 2700mhz and the ram at 270mhz (same timings, slight voltage increases).

 

[M733mhz]

You wouldn't notice a difference. You don't really notice and overclock until it gets drastic, usually the only way to tell between stock and OC is to run benchmarks.