When you go to buy a new laptop or PC the one thing that always makes you confused is the processor speed. You see numbers like 2.3 GHz, 3.4 GHz and sometimes 4.2 GHz — but you don’t know which one is good or bad. And the truth is not everyone needs the highest GHz. If you want to choose the best system for your need, then you should know what GHz really means and how much is enough for you. In...

