I have been experimenting with DLSS5 on my rtx5070Ti in the new Resonance Plague Tale since this game looks beautiful but also runs at high fps thanks to the lack of raytracing, so it has a lot of fps to spare. I play in 4K DLSS Performance and initially I was dropping from 180 to 80 fps just by enabling DLSS5, which is pretty drastic and unusable in most games if you dont have rtx5090, but yesterday's Optiscaler release allows to put dlss5 before the upscaler, so it is essentially applied on the initially rendered 1080p frames. 

This has basically halved the performance cost and now the fps tax is \~25-30% instead of previous \~55-65%. I have also managed to set it up so that the changes are more realistic and not as agressive, and it mostly just improves overall lighting and shadows, and i must say i really like it like this, it looks like i added path tracing insteaf of a "beautify AI filter". 

You can see it in these 2 screenshots, fps dropped down from 172 to 122, but the lighting and shadows look more realistic. This to me is more than acceptable visual tradeoff, I really like it. I hope nvidia also decides to move the dlss5 step before the upscaling step, because to me it looks like a no brainer, the image quality is basically identical and the fps tax drops to half with dlss performance.

DLSS5 placed before the upscaling step is amazing