Mickey: Why does Zen(+) seem to idle at such a high frequency?

I have two very similar setups software wise (Debian Linux based OS with icewm as window manager/user interface, no heavy background processes running, generally just ultra lightweight with a CPU load of about 0-1.5% per core at idle) but seemingly very different hardware behavior based on monitoring the CPU frequency using the built-in icewm traybar applet on both my Ryzen (Zen+) desktop and Llano (mobile K10(.5) on 32 nm) laptop. The (quad core) Llano laptop idles at roughly 800 MHz, while...

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