The
E5-2651 v2 is based on
Ivy Bridge architecture while the
P8600 is based on
Core.
Using the multithread performance as a reference, the E5-2651 v2 gets a score of
415 k points while the P8600 gets
21 k points.
Summarizing, the
E5-2651 v2 is
19.8 times faster than the
P8600. To get a proper comparison between both models, take a look to the data shown below.