I never use the Ryzen master on both my 2920x and 2600.
Ive always used the BIOS to OC.
The way I do it, is I enabled XMP first (or manually set the memory timings).
In your case, get a stable OC with your CPU. Once you know you are stable, enable the XMP.
If it crashed, increase the voltage on your CPU by .005 increments.
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