The model range of notebooks from ASUS is rather interesting. One and the same case may contain different components, which is reflected in the model number. In this case, "J" means that it's an Intel Centrino Duo notebook with external (or discrete) graphics controller. This logic is quite clear - notebook exterior changes nowadays much less dynamically than technical "innards". Besides, one and the same case may be used for a notebook on the Intel or AMD platform.



Link: Digit Life