NVIDIA GeForce RTX 4090/4080 Linux Compute CUDA & OpenCL Benchmarks, Blender Performance
It would have been more interesting if the AMD ROCm stack was playing well for this round of testing with AMD Radeon comparison points.
With FluidX3D the RTX 4090 performance was terrific though strangely the RTX 4080 was performing similar to the RTX 3080 in this particular benchmark.