The
3900 is based on
Zen 2 architecture while the
906EC is based on
Coffee Lake.
Using the multithread performance as a reference, the 3900 gets a score of
687.5 k points while the 906EC gets
494.2 k points.
Summarizing, the
3900 is
1.4 times faster than the
906EC. To get a proper comparison between both models, take a look to the data shown below.