Stuff you should know!-----Intel Core i3 vs. i5 vs. i7: Which One Do You Really Need?

Intel Core i3 vs. i5 vs. i7: Which One Do You Really Need?:
"The processor is the brain of a computer — but understanding the difference between processors requires a lot of brainpower of your own!

 Intel hasn’t made it any easier for customers with their strange naming schemes, and the question we get asked most often is:
What’s the difference between an i3, i5, or i7 processor?
Which one should I buy?"