I just tested this with the RandomX benchmark v1.0.4 (Win64) because I am thinking about picking up a Ryzen 3000 CPU. I only spent about 10 mins with it but was shocked how bad the TR4 platform performed (all tests were with LargePages enabled):
Ryzen 7 1700 @3.9 (3200 DDR): 5030 h/s (8 threads)
Ryzen 7 1700 @3.9 (3200 DDR): 4000 h/s (10 threads)
Ryzen 5 2600 @3.7 (2133 DDR): 3175 h/s (6 threads)
Ryzen 5 2600 @3.7 (2133 DDR): 3225 h/s (8 threads)
Threadripper 1950x @3.8 (2133 DDR): 4825 h/s (16 threads)
Threadripper 1950x @3.8 (2133 DDR): 1550 h/s (32 threads)
Edit: Was curious about RAM speed, so switched my 1700 to 2133 RAM and got 3837 h/s, so memory speed has a huge effect.