I have Ryzens in my rigs - built especially with monero in mind and my results are following (large pages enabled in Win 10):
Ryzen 5 1600X (3,8 Ghz at 1.23V) - stable 540 - 550 Hash/s - consumes ca 44W from wall
Ryzen 7 1700 (3,8 Ghz at 1.23V) - stable 630 Hash /s - consumes ca 44W from wall
I believe that I can get near 4 Ghz - but this setup is 24/7 rock solid and doesnt lead to unnecessary restarts of the system. Wattage was measured as a difference between idle system and CPU-only mining turned ON.
Ill build new rig with Ryzen 5 1600 this weekend - but I guess the results will be same as for 1600X - cause L3 cache and number of cores are identical.