I also am having similar high temperature spikes and VDDR SOC voltages.
System specifications are
CPU: 7950X
RAM: 2 x 32GB Kingston Fury 5600 1.25V
CPU Cooler: Thermalright Peerless Assassin
Motherboard: Gigabyte B650M Aorus Elite Wifi, BIOS F5 using AMD AGESA 1.0.0.6
GPU: RTX 4090
Windows 10...