https://wccftech.com/nvidia-rtx-30-fine-wine-investigating-the-curious-case-of-missing-gaming-performance/

NVIDIA's RTX 30 series launched to a ton of fanfare and jaw-dropping levels of performance claims and specifications - but somewhere between all the hype and third-party reviews, the promised doubling in performance vanished without a trace. Today, we are going to be investigating a very interesting phenomenon plaguing  NVIDIA GPUs and why not everything is as it seems. Nothing is presented as the gospel truth for you to believe and you are encouraged to use your own judgment according to taste.

The argument is simple, Jensen promised twice the graphics power in Ampere GPUs so we should see roughly twice the shading performance in most titles (without any bells and whistles like DLSS or RTX). This, most curiously, isn't happening. In fact, the RTX 3090 is anywhere from 30% to 50% faster in shading performance in gaming titles than the RTX 2080 Ti even when it more than twice the number of shading cores. TFLOPs is, after all, simply a function of shading clocks multiplied by the clock speed. Somewhere, somehow, performance is being lost.