What chip?
You must me talking about the SD card. The SD card is loaded with the mapping. There are two available maps, namely Navionics and Nautic path. You should have Nautic Path.
From Lowrance:
Nautic path "Offshore and coastal navigational marine electronic charts containing high detail mapping with depth contours, nav aids, tides and currents, & much more."
Navionics "Navionics® Electronic Charts comprise the world's largest "seamless" marine electronic chart database."
According to this Nautic path is better with more details!