This is just marketing information from the online store or place of purchase. Please bear in mind the Intel Graphics Controller is called Intel® HD Graphics first generation, Intel® HD Graphics 2000/3000 or Intel® HD Graphics 4000/2500. The same for mobile computers like laptop computers.
See below for product specifications:
http://software.intel.com/en-us/articles/quick-reference-guide-to-intel-integrated-graphics/
http://software.intel.com/en-us/articles/hd-graphics-quick-reference-guide/?wapkw=%28hd+graphics%29