The
E5-2667 v3 is based on
Haswell architecture while the
506E8 3GHz is based on
Kaby Lake.
Using the multithread performance as a reference, the E5-2667 v3 gets a score of
343.6 k points while the 506E8 3GHz gets
210.9 k points.
Summarizing, the
E5-2667 v3 is
1.6 times faster than the
506E8 3GHz. To get a proper comparison between both models, take a look to the data shown below.