Memory maker confirms AMD Ryzen 7000 will support faster DDR5-5200 memory out of the box - VideoCardz.com
Ryzen 3000 Memory Benchmark & Best RAM for Ryzen (fClock, uClock, & mClock) | GamersNexus - Gaming PC Builds & Hardware Benchmarks
Best Memory (RAM) for 3rd Gen AMD Ryzen CPUs 3900X, 3700X, 3600
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
Ryzen 5 3600 Tested With Different RAM Speeds - YouTube
Ryzen 3000 memory controller has "half the performance" on single CCD CPUs | TechPowerUp Forums
Testing 3rd-Gen Ryzen DDR4 Memory Performance and Scaling | TechSpot