The 1080 Ti matched the performance of the RTX 2080, while the 2080 Ti was somewhere between 25-30% better, but nearly $400 more. There's no need for the use of DLSS on a PC paired with a monitor under 32" at a resolution of 1440p or 4K, because the pixel density would have very little aliasing. It would be better suited for someone connecting their PC to a 60" 4K display. I pretty much use FXAA @1440p, because there is very little aliasing on a 27" display.
Here's good review from Digital Foundry.
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