What can you OC and why?

So I had a question that I've had for a while and just never really pursued an answer. I'm now starting to look into OCing and I was wondering what different parts can you OC. I use to think, you OC the CPU and your done, thats the whole process. But reading these forums the past 6 months has made me realise its more then that. So you can OC the CPU just for more overall speed, you can OC teh GPU obviously but exactly why? What else in your computer can you OC? If this is a double post I'm extremely sorry you can just link me to there.
Thanks.

The 'why' to overclocking is 'faster', period. Whether it's CPU/GPU/RAM doesn't matter, OC=faster.

To actually see and feel results the most, you overclock the CPU. GPU overclocking is possible but not nearly as many people do it, because you can't really get as impressive of gains as you can with a CPU. You can also overclock RAM, but the performance benefit is basically zip except on synthetic memory benchmarks.

O man I just wrote a long reply and my browser GG'd itself . How come most people seem to only talk about OCing their CPU? Is it the easiest? Or is it the hardest so people need more advice? OCing the memory seems kind of pointless to me, theres never really performance issues there. The GPU makes sense, but I don't see people talk about it nearly as much as they do about OCing the CPU... I think I should start paying you overshocked, you've been there to answer every single one of my OC questions haha.
PS - How did you get ur 920 all the way to 4.53ghz... Most people seem to only go up to 3.4ghz or so.

To paraphrase myself approximately 3 posts up... Aww forget about it I'm sure you can read.

CPU will show more performance gains when being overclocked, not just in benchmarks and frame rates but in speed.

When i overclocked my GTS 250's i got to 842 mhz from 738 mhz wich is about a 14% gain from the stock speeds.


Now on the other hand my e8500 started at 3.16GHz and i got it to 4.93GHz wich is a 56% percent gain.


Get it?