Question about input lag with VRR on a high RR monitor with a low fps game.

[2mg]

The refresh rate you run the monitor at becomes the upper limit of the VRR range. (Unless the display has an upper VRR range limit that is lower than the fixed max refresh rate of the display, but this is rare.)

Sorry I meant did the VRR range increase on the lower side, used to have a cutoff already at around ~45 FPS, that's why I also asked if limiting to 60Hz reduced the lower cutoff even more.

[RealNC]

Sorry I meant did the VRR range increase on the lower side, used to have a cutoff already at around ~45 FPS, that's why I also asked if limiting to 60Hz reduced the lower cutoff even more.

No. But the driver might be using a higher starting point when running at higher refresh rates. If your range is 40-144 at 144Hz, the driver might actually be using 48-144 or 50-144, depending on your average FPS. At 60Hz, you might indeed be getting 40 as the lowest.

[jorimt]

Sorry I meant did the VRR range increase on the lower side, used to have a cutoff already at around ~45 FPS, that's why I also asked if limiting to 60Hz reduced the lower cutoff even more.

To add to what @RealNC said, LFC behavior is heavily display-dependent, and the "cuttoff," as you put it, can vary by the given model, its panel type, the currently set max refresh rate, whether it has a module or not, the driver vendor and implementation, etc.

There is no one single LFC threshold number anymore, especially since G-SYNC Compatible became a thing.

[2mg]

Sorry I meant did the VRR range increase on the lower side, used to have a cutoff already at around ~45 FPS, that's why I also asked if limiting to 60Hz reduced the lower cutoff even more.

To add to what @RealNC said, LFC behavior is heavily display-dependent, and the "cuttoff," as you put it, can vary by the given model, its panel type, the currently set max refresh rate, whether it has a module or not, the driver vendor and implementation, etc.

There is no one single LFC threshold number anymore, especially since G-SYNC Compatible became a thing.

Wait isn't LFC some sort of FPS "doubler" so VRR keeps on going when real FPS drops drastically? Doesn't that have some extra input lag?

And didn't going below the lowest VRR threshold previously just disable VRR and you'd get a non-Vsync generic tearing?

[jorimt]

Wait isn't LFC some sort of FPS "doubler" so VRR keeps on going when real FPS drops drastically?

When the framerate drops below the minimum supported physical refresh rate (and/or at the set threshold for when LFC is determined to trigger) on the given monitor.

Doesn't that have some extra input lag?

No.

And didn't going below the lowest VRR threshold previously just disable VRR and you'd get a non-Vsync generic tearing?

For any VRR monitor that didn't or doesn't support LFC, yes.