DSR stands for Dynamic Super Resolution. Basically what you're doing is running your games at a higher resolution than your monitor supports, then downscaling it to your monitors resolution.
DSR = deprecated DLDSR = Downscaling after rendering in a higher resolution for better quality - Use it to get a small taste of what 4K would be like (native 4K is much better) or in older games. DLSS = Upscaling by reconstructing frames using temporal info.
I'm trying DLDSR/DSR for the first time and I wanted to get some advice on which resolution to choose and what smoothness as well. I see 1.78 and 2.25 as my top two options in the Nvidia control panel, as well as numerous legacy scaling options like 1.5x or 2.0x. I have no idea what to choose for my monitor, 3440x1440. Also what smoothness percentage should I use? Sine I'm going up in ...
Even 5k DSR doesn't fix the crawling with DLSS. The temporal stability is way better with the TAA. You run around everywhere and never see crawling. Obviously the pitfall with the TAA is the blurriness. But I think it's acceptable if use the resolution scale feature to increase it above native. (DSR or DLDSR isn't strictly necessary for this game)
With the old DSR, if you set it too low (like under the default 33%), you would start to see jaggies eventually. With the new DLDSR, you won't really get any additional jaggies at any smoothness level.
DSR/DLDSR has a performance cost of its own. Rendering a game at a given resolution will perform better if the display resolution is the same and it doesn't have to go through that downscaling.
Go to NVIDIA's CP and enable DSR/DLDSR, I suggest using DSR at 4x/0% for better results. If your card supports DLDSR, 2.25x/33% looks nearly as good and it easier to run.
You can assign DLDSR/DSR resolutions to each games on a case by case basis. What this does is whenever you launch your game through playnite, it will automatically apply your chosen resolution to the desktop.
I was quite disapointed with DSR as it gave me a blurry picture, so instead I use a custom resolution of 3840x2160 and the results are way sharper than DSRx4 on my 1080P display.