Both models
i5-12400 and
90671 are based on
Alder Lake architecture.
Alder Lake is the 12th generation of Intel Core. It uses the 10nm proccess and was the first to introduce a hybrid architecture with Performance cores and Efficiency cores.
Using the multithread performance as a reference, the i5-12400 gets a score of
552.6 k points while the 90671 gets
878.6 k points.
Summarizing, the
90671 is
1.6 times faster than the
i5-12400. To get a proper comparison between both models, take a look to the data shown below.