The
G645 is based on
Sandy Bridge architecture while the
4205U is based on
Whiskey Lake.
Using the multithread performance as a reference, the G645 gets a score of
35.4 k points while the 4205U gets
37.6 k points.
Summarizing, the
4205U is
1.1 times faster than the
G645 . To get a proper comparison between both models, take a look to the data shown below.