Performance gain. Intel's fourth "Core" generation sees the light of the day and is expected to cause sensation again. In our review, we describe the new Haswell architecture in detail and test the CPU of several quad core models.
http://www.notebookcheck.net/Review-Intel-Haswell-Processors.93189.0.html
Review HD 5000/5100/5200 please
It is strange to show ANY benches without strict comparing to a previous Ivy Bridge CPUs...