Just finished a build for my brother using a Ryzen 5 2600x. I noticed while at idle core clocks are spiking between ~2.2 ghz and 4.2 ghz. I've been inside the BiOS only to set the XMP for the RAM at 3200 mhz. I can audibly hear the fans spinning up and down while just sitting at Windows home screen. I've installed the latest Windows updates and this activity still persists. This is my first Ryzen build so I wanted to know if this is normal or does some tweaking need to be done with fan curves, voltages, etc... Thanks.
CPU: Ryzen 5 2600x
Cooler: Stock AMD Wraith Spire
RAM: G Skill Ripjaws V 3200mhz
GPU: EVGA Nvidia GTX 1060
Mobo: Gigabyte Aorus B450 Pro Wifi
PSU: Seasonic Focus Gold 650W 80+ Gold
SSD: Samsung 860 Evo 500gb