I use CPU Boss and CPUBenchmark.net to compare CPUs. It's especially handy when you're comparing newer and older processors. Often, a newer "Pentium" processor

I use CPU Boss and CPUBenchmark.net to compare CPUs. It's especially handy when you're comparing newer and older processors. Often, a newer "Pentium" processor using better fab can outperform an i5 from just a couple years ago. So, that great deal on an i5 laptop advertised in deals of the week email you got may not be such a great deal.