Recent AMD products for OEM-segment are well renamed older video cards. The same strategy is used by NVIDIA in laptops: GeForce GT 730M and GeForce 710M.
So, the model GeForce GT 730M is familiar to the GeForce GT 640M. This decision is based on the processor GK107, as indicated by the list of supported technologies (PCI Express 3.0, TXAA, for example). GeForce 710M came from GeForce GT 620M (GF117).
Presumably, NVIDIA will continue a series of renaming, and in the coming weeks, we will return to this topic.