I've been reading the menron thread over in buying tips. I came across the line "I thought it was 20% faster at same clock speeds". Now I've never paid much attention to clock speeds and Mhz numbers. But this confuses me. I've heard that it is not longer about clock speeds as people keep saying here. But how do you define the speed of a machine against another in numbers (without putting both through benchmark tests). Can anyone explain this in layman's terms? I know two core are better then one, does this make a 2 core 1.8Mhz equal to a single core 3.6Mhz?