The
G645 is based on
Sandy Bridge architecture while the
i3-6006U is based on
Skylake.
Using the multithread performance as a reference, the G645 gets a score of
35.4 k points while the i3-6006U gets
47.5 k points.
Summarizing, the
i3-6006U is
1.3 times faster than the
G645 . To get a proper comparison between both models, take a look to the data shown below.