How is the Core i7 840 M almost 500 points faster than the 820 M?

[Dark]

I was looking through benchmarks and noticed that the Core i7 840 received a much higher benchmark than the 820! I thought all Intel did was overclock the 820 M! What gives? Even the 740 M is rated higher than the 820 M. Does clock frequency make that much of a difference?I know what a higher frequency does, but does going up .1 of a gigahertz really make a difference?

 

[Zachy]

I want to think you know the answer to this question considering the way you named yourself and the picture you chose.