Title. Seems that I set Master, then reboot and things are set. After exiting Master, exam in Task Manager shows CPU back at default. Looked in booklet but doesn't say whether you have to keep application running to keep overclock.
Found this link from Tom's Hardware asking the same question you did: Do I need to keep my ryzen master open ? - [Solved] - Overclocking.
Here is an In-depth manual on Ryzen Master program. It has all the details on how the program works and configured.https://www.amd.com/system/files/2017-03/AMD-Ryzen-Processor-and-AMD-Ryzen-Master-Overclocking-Users-Guide.pdf