greenbrucelee

What he said ^

or you could use the man in the box anaolgy. you have one man in a box being passed an instruction which is fine but that man has to process the instruction then carry it out but if you have two men in the box then one can process it whilst the other carries it out.

The instruction comes from ram the processing and carruing out is your cpu. Hence overclocking the cpu can be a good thing if done properly but overclocking the ram has little effect as the ram can only pass an instruction at a time so if your ram is big neough to hold instructions then you don't really need to mess with it. Only changing the frequency within its limits may be required when overclocking but not going over that frequency.