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
Amazon.com: AMD YD1700BBAEBOX Ryzen 7 1700 Processor with Wraith Spire LED Cooler : Electronics
G.Skill Flare X Series 16GB (2 x 8GB) 288-Pin SDRAM (PC4-25600) DDR4 3200 CL14-14-14-34 1.35V Dual Channel Desktop Memory Model F4-3200C14D-16GFX at Amazon.com
Overclocking With a Ryzen 7 1700 - The ASRock B450 Gaming ITX/ac and B450 Gaming K4 Motherboard Reviews