Going over 1900FCLK is not important at all.tuning the Ram is most important on Ryzen ,especially for PC gaming.It is so fun though to play with the Ram,I encourage to get the highest you can.
AMD Ryzen Fabric Clock 1467Mhz (DDR4 2933Mhz) vs Fabric Clock 1933Mhz (DDR4 3866Mhz) PC Games B-die Ram.
Test were done on 3800X
Battlefield 5 1920x1080
DDR4 2933 Mhz (1467 MHz)
AVG -143.8FPS
1%Low -82FPS
0.1%Low -58FPS
DDR4 3866 Mhz (1933 Mhz)
AVG -144.5FPS
1%Low -82FPS
0.1%Low -62FPS
Grand Theft Auto V 1920x1080
DDR4 2933 Mhz (1467 MHz)
AVG -112.6FPS
1%Low -73FPS
0.1%Low -28FPS
DDR4 3866 Mhz (1933 Mhz)
AVG -114.5FPS
1%Low -76FPS
0.1%Low -28FPS
Video of test side by side
Red Dead Redemption 2 1920x1080
DDR4 2933 Mhz (1467 MHz)
AVG -95.2FPS
Min -47.5FPS
1%Low -68.0FPS
DDR4 3866 Mhz (1933 Mhz)
AVG -97.0FPS
Min -47.2FPS
1%Low -70FPS
Sleeping Dogs 1920x1080
DDR4 2933 Mhz (1467 MHz)
AVG -239.4FPS
Min -108.2FPS
1%Low -118FPS
DDR4 3866 Mhz (1933 Mhz)
AVG -243.9FPS
Min -109.6FPS
1%Low -118FPS
Video of test side by side