The rendering overhead seems to be fairly low when comparing FSRs internal resolution to it’s native counterpart. Hardware Unboxed had it benchmarked on 8 GPUs, from RX570 to RX6800XT and GTX1070Ti to RTX3080, with FSR from 1080p performance mode to 4K ultra quality and native.
Link to that section here; AMD FidelityFX Super Resolution Analysis, Should Nvidia be Worried? - YouTube
And in image form from TechPowerUp
but it is fine tuned for AMD hardware first and foremost
The improvements look to be pretty equal across the board for both brands, so I don’t really know what “fine tuning” there really is to do. FSR is losing 10% overhead at most when comparing 4K @ quality FSR (1440p internal) to 1440p native, with AMD is ‘losing’ more percentage wise than Nvidia if anything. Slower cards like the RX570 see the smallest improvements.
Gamers Nexus benchmarked it on the 5700G APU (ZEN3+RDNA2 chip) and it still made significant gains, however it did have a 15% overhead. Sounds like the overhead is directly related to total performance (surprise surprise).
All things considered, it seems super easy to implement and we’d all love Asobo to add it to the sim. It will give a lot of people the extra performance bump to push for higher resolutions - and more performance overall if they can use CPU cores more efficiently.
Still need to push it up for the Dev Q&A so they’d at the very least acknowledge it’s existence
Go vote if you haven’t yet! Is support for AMD new FSR technology planned ?