NVIDIA have packed many forward looking features and hardware stages into their new RTX branded GPUs, but many of these new advancements and techniques are not used in traditional raster workloads. It's a huge shift as a large portion of the die area is now devoted for non-raster work (Tensor & RT Cores). To find out how the new RTX 2080 GPU fair against the top-end Pascal chips in gaming, the lovely Kite Demo from Unreal Engine 4 is used in 4K resolution.
The RTX 2080 is 10% faster than the GTX 1080 Ti in Unreal Engine 4 Kite Demo.
Unreal Engine 4 Kite Demo results
Unreal Engine 4 Kite Demo charts
Unreal Engine 4 Kite Demo 95 %ILE