The
3855U is based on
Skylake architecture while the
2,84GHz is based on
-.
Using the multithread performance as a reference, the 3855U gets a score of
24.6 k points while the 2,84GHz gets
79.8 k points.
Summarizing, the
2,84GHz is
3.2 times faster than the
3855U. To get a proper comparison between both models, take a look to the data shown below.