Citation :
However while VSR and DSR are designed to solve the same problem, the two technologies go about solving it in very different ways. With DSR NVIDIA implemented it as a shader program; it gave NVIDIA a lot of resolution flexibility in exchange for a slight performance hit, and for better or worse they threw in a Gaussian blur by default as well. AMD however opted to implement VSR directly against their display controllers, skipping the shading pipeline and the performance hit at a cost of flexibility.
Due to the nature of VSR and the fact that it heavily relies on the capabilities of AMD’s display controllers, only AMD’s newest generation display controllers offer the full range of virtual resolutions.
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