When AMD announced Fidelity FX Super Resolution on Computex, it included a list of supported Vega, RX 500, RX 5000, and RX 6000 series Radeons:
Regarding support for the second generation Polaris (Radeons RX 500) It is unclear what prompted AMD to decide not to support the first generation Polaris (Radeony RX 400). As for the 3D core and its equipment, it is not between the two Polaris generations , so there should not be a technological problem.
But it looks like a strange decision (or omission?) Has been corrected by AMD and announced that FSR will be enabled on the Radeon RX 400. That is, the Radeon RX 480, RX 470, RX 460 and their mobile versions. This generation will be added to the official list on the AMD website. The Fidelity FX Super Resolution will be released in two weeks on June 22.