I have the Asus Rog Strix x570e motherboard with the 3700x (stock Wraith Prism cooler), 16GB Corsiar Vengence RGB Pro DDR4-3000, an Intel and HP M.2 SSD, and a Gigabyte RTX 2070 Super Gaming OC graphics card. All running by a Corsair RM750i PSU. Running Windows 10 Pro.
When I start up the computer and it's at idle on the desktop, running either the Ryzen Master program, CAM software, or CPU ID - it shows my clock speeds are at 4200-4400. I haven't boosted anything in the BIOS or Ryzen Master, everything is default setting. The Windows Power Plan is set to AMD Balanced. I've downloaded all the latest BIOS, Chipset, etc. drivers. Basically everything is current, vanilla stock, no mods.
Why is the CPU running at what seems to be the boost speed, even at idle (CPU indicator shows < 10% load). If I change the Power Plan setting to 99% for the Maximum Processor State, immediately the CPU speed drops back down to ~3600 mhz and the temps drop to the mid 40s Celsius (from the low 50s).
What's going on here?