The
906ED 2.1GHz is based on
Comet Lake architecture while the
5900X is based on
Zen 3.
Using the multithread performance as a reference, the 906ED 2.1GHz gets a score of
657.2 k points while the 5900X gets
840.1 k points.
Summarizing, the
5900X is
1.3 times faster than the
906ED 2.1GHz. To get a proper comparison between both models, take a look to the data shown below.