This board does support overclocking, but the bios isn't exactly user friendly. To OC your RAM beyond 2133 you need to boost the SoC voltage, this is over in the O.N.E tab of the setup. All voltage adjustments are by offset, check the starting voltage before you touch these. Then you need to set your timings in Advanced, AMD CBS, UMC Common Options. This is what threw me - all the timing values are Hexadecimal. If you can convert in your head, great, otherwise fire up calc.exe on another machine and switch to Programmer mode. All the multiplier and voltage values in the P-State settings are also Hex. The multiplier and divider seem to make sense if you do the math and convert, but the VID value doesn't seem to correspond to anything. Luckily it does show you the results in decimal just above - FF is 0V and it goes up as you reduce the value.
To OC the CPU, you need to go into the Custom P-States menu under AMD CBS, Zen options, and set P0 to custom. Then bump the hex value for the multiplier, at the default divider of 8 it will go in 25Mhz steps. Then REDUCE the value of VID to increase voltage to your desired value. Unfortunately adding more than 100Mhz this way seems to result in some very odd behavior. Once booted into Windows, it will use the VID from P0 but not the multiplier. It uses the multiplier from P1. If I set P0 AND P1 identically, it seems to result in a successful OC, but Windows will then never back down from full speed, it's like P2 doesn't exist. Also, in this state HWInfo64 reports the CPU running at 1.55V, while Ryzen Master shows the voltage I've actually set. Not sure which is correct in this case. Needless to say this is driving me a little nuts.