Try to use PresentMon with the frametime graphs. Make them go really high for a sec (like by changing a graphical setting), and you'll see that it won't go down, even though nowhere in the graph now gets even closer to that max value of the right axis
In this screenshot, I've enabled path tracing without any XeSS, which resulted in the worst frametimes you could imagine, they went up to around 230ms, but I've disabled since 5 minutes ago, and the scale doesn't go down, which makes the graph reading impossible as I'm now trying to see a difference of 0.5ms, in a graph axis that goes up to 109ms
Try to use PresentMon with the frametime graphs. Make them go really high for a sec (like by changing a graphical setting), and you'll see that it won't go down, even though nowhere in the graph now gets even closer to that max value of the right axis
In this screenshot, I've enabled path tracing without any XeSS, which resulted in the worst frametimes you could imagine, they went up to around 230ms, but I've disabled since 5 minutes ago, and the scale doesn't go down, which makes the graph reading impossible as I'm now trying to see a difference of 0.5ms, in a graph axis that goes up to 109ms