AMD Ryzen 5000 "Zen 3" Desktop CPU Built For Memory Overclocking, DDR4-4000 Recommended As Sweet Spot
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
Guide to RAM Frequency & What Yours Should Be Set To