The
5745M is based on
Piledriver architecture while the
E5-2651 v2 is based on
Ivy Bridge.
Using the multithread performance as a reference, the 5745M gets a score of
37.1 k points while the E5-2651 v2 gets
426.2 k points.
Summarizing, the
E5-2651 v2 is
11.5 times faster than the
5745M. To get a proper comparison between both models, take a look to the data shown below.