Due to the different architectures, features and technologies we cannot compare products from different families. Also, Intel does not offer benchmarking assistance.
If you are upgrading your computer, our best recommendation is working with the newer models available. For example, on the Intel® Pentium® Processor G645 you will be able to work with a higher technology on Graphics.
There is a great 3rd Party site that has system Benchmarks. These are system related with the different processors and Motherboards running test and you can see the difference in performance by downloading each system. it is located here: http://www.spec.org/cgi-bin/osgresults?conf=general