Phoronix published a review on the Intel Celeron/Pentium/Core i3/i5/i7 - NVIDIA vs. AMD Linux Gaming Performance A quote from the article:

Five AMD/NVIDIA graphics cards tested on five different Intel Kabylake processors from a low-end $40 Celeron CPU to a high-end Core i7 7700K is the focus of today's Linux benchmarking. Various OpenGL and Vulkan Linux gaming benchmarks were run to see how the RadeonSI and NVIDIA Linux performance evolves from a Celeron G3930 to Pentium G4600 to Core i3 7100 to Core i5 7600K to Core i7 7700K.

 Intel Celeron/Pentium/Core i3/i5/i7 - NVIDIA vs. AMD Linux Gaming Performance @ Phoronix