Both models
E5-4640 and
i5-2467M are based on
Sandy Bridge architecture.
"Sandy Bridge codename was originally ""Gesher"". The development began in 2005 and four years later, the first Sandy Bridge CPU was presented. The most prominent features are Intel Turbo Boost 2.0, AES encryption and SHA-1 hashing acceleration, Advanced Vector Extensions (AVX) 256-bit instruction set and the ability to have up to 8 physical cores or 16 logical cores through Hyper-Threading."
Using the multithread performance as a reference, the E5-4640 gets a score of
610.2 k points while the i5-2467M gets
29.8 k points.
Summarizing, the
E5-4640 is
20.5 times faster than the
i5-2467M . To get a proper comparison between both models, take a look to the data shown below.