NVIDIA GeForce GTX 680 To RTX 2080 Ti Graphics/Compute Performance
Unigine Valley saw just a 15% increase in performance with the RTX 2080 Ti while its performance-per-Watt came in on par with the GTX 1080 Ti.
Unigine Superposition as the company's newest OpenGL benchmark is rather harsh on the older hardware, but here are those numbers if you are curious.
With ultra quality settings at 1440p, the RTX 2080 Ti saw a 57% increase in frame-rates over the GTX 1080 Ti and a 14% improvement in performance-per-Watt.