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
Premiere Pro CC 2017 AMD Ryzen 7 1700X & 1800X Performance | Puget Systems
7 RAM Speeds 21 Games Tested on AMD Ryzen. - YouTube
AMD Ryzen 7 1800X, 1700X and 1700 Processor Review - Page 4 of 15 - Legit Reviews