The
i3-5005U is based on
Broadwell architecture while the
E5-2651 v2 is based on
Ivy Bridge.
Using the multithread performance as a reference, the i3-5005U gets a score of
47.9 k points while the E5-2651 v2 gets
426.2 k points.
Summarizing, the
E5-2651 v2 is
8.9 times faster than the
i3-5005U . To get a proper comparison between both models, take a look to the data shown below.