why does nvidia's do not scale option add so much lag?

[Anarchist420]

is it a driver issue or a hardware issue? i was wondering because the monitor's builtin scaler doesnt add latency

 

[bystander36]

"Do not scale" should add no lag, as it doesn't do anything but display what was rendered, unless it is your monitor's scaler that is adding the lag. Or did you mistype?

 

[Anarchist420]

"Do not scale" should add no lag, as it doesn't do anything but display what was rendered, unless it is your monitor's scaler that is adding the lag. Or did you mistype?

if scaling is set to "display" (rather than "gpu") input seems more fluid. thank you so much for replying

 

[bystander36]

So obviously you mistyped your first post. It is not the "do not scale" option that is adding lag, but the "fit to screen" or "aspect ratio" that is. I do notice some added latency when I down sample, which obviously scales, though that must be scaling on my monitor, as I do not have it set to scale on the GPU. I had to turn it off last night when playing Skyrim, as I was getting nauseated due to the added latency.

 

[Anarchist420]

So obviously you mistyped your first post. It is not the "do not scale" option that is adding lag, but the "fit to screen" or "aspect ratio" that is. I do notice some added latency when I down sample, which obviously scales, though that must be scaling on my monitor, as I do not have it set to scale on the GPU. I had to turn it off last night when playing Skyrim, as I was getting nauseated due to the added latency.

sorry for the confusion... i actually didnt mistype my first post. it sounds like we get opposite results

 

[f1sherman]

downsampling definitely adds latency. and this is almost clearly perceived as rendering and not input latency.

I've never noticed scaling adding latency on native res , but some people swear by it

 

[bystander36]

sorry for the confusion... i actually didnt mistype my first post. it sounds like we get opposite results

Actually, I took another look, and my downscaling option was scaling on the GPU, and it definitely caused latency. I might try to scale on the Display next time to see if there is a difference...assuming it can even do it.

But "do not scale" doesn't cause latency.

 

[f1sherman]

T.Lottes was all for writing a proper scaler, alas he went to Epic