The 7-nm Navi 10 chip is more energy-efficient than Polaris and Vega chips. However, the cooling solution of the Radeon RX 5700 XT fails to impress in our review. The GPU performs as expected and is well-suited for 1440p gaming. In this review, we examine how the RX 5700 XT stacks up against Nvidia's Turing-based GPUs.
https://www.notebookcheck.net/AMD-Radeon-RX-5700-XT-Review-Known-issues-of-the-reference-design.428218.0.html
"We made a conscious decision not to use the X570 platform with the Ryzen 3900X to ensure a fair comparison with Nvidia's Super GPUs."
Why? You gave absolutely no explanation as to your rationale why. This sentence is not even a complete paragraph. AMD went through a bit of trouble for us to use their 3000 series processors on the X570 platform.
You lost quite a bit of credibility, enough for me to look for objective results elsewhere and skip over the rest of your benchmarks. You essentially invalidated your results with your exclusion of X570.