Click link for some benchmarks:http://www.notebookcheck.net/Intel-HD-Graphics-4000.69168.0.html
Beware that not all Intel HD 4000 graphic cores have the same performance. That is because they will have different clockspeed depending on which CPU model you are looking at. Click following link to see the specs for 5 different Ivy Bridge mobile CPUs. The Graphics Base Frequency varies from 350MHz to 650MHz. The Graphics Max Dynamic Frequency ranges between 850MHz and 1.3GHz.