The
E5-2651 v2 is based on
Ivy Bridge architecture while the
i9-12900KF is based on
Alder Lake.
Using the multithread performance as a reference, the E5-2651 v2 gets a score of
426.2 k points while the i9-12900KF gets
491 k points.
Summarizing, the
i9-12900KF is
1.2 times faster than the
E5-2651 v2. To get a proper comparison between both models, take a look to the data shown below.