The
G3900TE is based on
Skylake architecture while the
G645 is based on
Sandy Bridge.
Using the multithread performance as a reference, the G3900TE gets a score of
49.3 k points while the G645 gets
35.4 k points.
Summarizing, the
G3900TE is
1.4 times faster than the
G645 . To get a proper comparison between both models, take a look to the data shown below.