Or stick with 3, 5, 7 and 9 nomenclature:it could just as easily be "5000 series to commemorate their 50th year and 7 because its 7nm" and all of them are called RX5700 and we get a cut down one called something stupid like RX5700 lite
RX 5730
RX 5750
RX 5770
RX 5790
My, those are familiar numbers...