Navi 20 Series is Known Internally As ‘The Nvidia Killer’
http://www.redgamingtech.com/navi-20-series-is-known-internally-as-the-nvidia-killer-exclusive/

Navi10 = 5700 (XT) RDNA1 7nm
Navi12 = 5600 (XT) RDNA1 7nm
Navi14 = 5800 (XT) RDNA1 7nm
Navi20 = 5750(XT) RDNA1 7nm+ (10Refresh)
Navi21 = ?(XT) RDNA2 7nm+
Navi23 = ?(XT) RDNA2 7nm+