The
E5-2651 v2 is based on
Ivy Bridge architecture while the
5745M is based on
Piledriver.
Using the multithread performance as a reference, the E5-2651 v2 gets a score of
426.2 k points while the 5745M gets
37.1 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.