The
Q8400 is based on
Core architecture while the
G645 is based on
Sandy Bridge.
Using the multithread performance as a reference, the Q8400 gets a score of
51.9 k points while the G645 gets
35.4 k points.
Summarizing, the
Q8400 is
1.5 times faster than the
G645 . To get a proper comparison between both models, take a look to the data shown below.