6500 is clocked 10% higher and costs 10% more. I'd argue "neither", since 7xxx CPUs are out. The i5 7400 costs about the same as the 6400 and is clocked about the same as the 6500.
6500 is clocked 10% higher and costs 10% more. I'd argue "neither", since 7xxx CPUs are out. The i5 7400 costs about the same as the 6400 and is clocked about the same as the 6500.