There isn't much difference between the cpus apple is offering. The i7 has 4mb of cache instead of 3mb, higher base clock speed, and higher turbo clock speed.

There isn't much difference between the cpus apple is offering. The i7 has 4mb of cache instead of 3mb, higher base clock speed, and higher turbo clock speed. Here is Intel's infromation on the three chips: http://ark.intel.com/Compare.aspx?ids=47341,43544,43560 http://ark.intel.com/Compare.aspx?ids=47341,43544,43560 For some other cases, there are bigger differences between the i5 and i7, but not for these chips.