The
T6600 is based on
Core architecture while the
G645 is based on
Sandy Bridge.
Using the multithread performance as a reference, the T6600 gets a score of
20.6 k points while the G645 gets
35.4 k points.
Summarizing, the
G645 is
1.7 times faster than the
T6600. To get a proper comparison between both models, take a look to the data shown below.