Chup

Hi! I recently installed a Ryzen 2700x on a MSI X470 motherboard. Just want to say that I don't know much about this stuff, so sorry for a probably bad explanation. So my issue, if this is a issue. Is that on idle at 0-5% load, the voltage keeps going up and down. The temp also goes up and down accordingly. The CPU goes from around 2750mhz up to 4075mhz. And it does so constantly. Temp with stock cooler is from 45°C to 55°C. This is all on idle. When I'm in a game like PUBG. The temp sticks at nice flow around 55-57°C but can sometimes spike up 65°C in short durations, which I would think is okay. On Destiny 2 it was hovering from 57°C to 64°C. I have updated every driver I can think of, including the motherboard. Is it something wrong, or is this normal for the ryzen CPUs? Thanks in advance for any helpfull explanations. ?