Some memory speed benchmarks with a Ryzen 1700 @ 4.0GHz and a 1080 Ti, 2666 Auto vs 3200C14 vs 3466C14 tweaking sub-timings. Timings and settings used in the comments. : r/Amd
AMD Ryzen 7 1700 Overclocking - Best Ryzen Processor? - Page 4 of 11 - Legit Reviews