Oh, and I have noticed something odd.
Those are allegedly default "scaling factors" of FSR.
View attachment 254580
AFAIR factors in config file that are set when you choose quality in menu are nothing like they should be according to this values.
For Ultra Quality should be 0.769 (1/1.3) in EDO it's 0.71
For Quality should be 0.666 (1/1.5) in EDO it'S 0.6x
There was 0.51 for some setting too.
I don't remember exactly, I am only sure that I had to enter them manually when I wanted to test 1.33 / 1.5 rates, because values in config were totally bizarre.
Now, I suspect FSR will work with any scaling factor, but the best results we can get by are "adding" +20, +25, +33, +50% +100% to picture dimensions - what fits pre set Nvidia DSR hardware supersampling resolution that follow this exact logic.
Scaling factors in EDO config look like someone just entered some values randomly with some "improvised" stepping, they make no sense.
What inevitably triggers more scaling artifacts, because rounding etc.