ZenTimings by Ivan Rusanov is a tiny (< 500 KB download) app that lets you monitor your machine's memory timings in a really neat user-interface. The app works with all generations of AMD Ryzen processors, as well as Athlon processors based on the "Zen" microarchitectures. Besides timings, you also get basic info about the main clock domains that affect memory, such as memory clock (DDR), MCLK, UCLK, FCLK; relevant voltage readouts. This simple app is completely free, and open-source, if you'd like to inspect the code. The latest version v1.2.2 adds PHYWRD, PHYWRL, PHYRDL and PowerDown reading, DRAM and VTT readings, and the latest AMD "Dali" APUs. If you like the app, consider contributing to Rusanov on his website, in the source link below.
DOWNLOAD: ZenTimings by Ivan Rusanov v1.2.2