The
E5-2651 v2 is based on
Ivy Bridge architecture while the
B980 is based on
Sandy Bridge.
Using the multithread performance as a reference, the E5-2651 v2 gets a score of
415 k points while the B980 gets
31.8 k points.
Summarizing, the
E5-2651 v2 is
13.1 times faster than the
B980. To get a proper comparison between both models, take a look to the data shown below.