The
E3-1220 v3 is based on
Haswell architecture while the
906ED 2.1GHz is based on
Comet Lake.
Using the multithread performance as a reference, the E3-1220 v3 gets a score of
140.8 k points while the 906ED 2.1GHz gets
657.2 k points.
Summarizing, the
906ED 2.1GHz is
4.7 times faster than the
E3-1220 v3 . To get a proper comparison between both models, take a look to the data shown below.