Update your post to include full system hardware specs and OS information.
Include PSU: make, model, wattage, age, condition (original to build, new, refurbished, used)? History of heavy use for gaming, video editing, or bit-mining?
Disk drives: make, model, capacity, how full?
What MHz is shown after the PC is restarted? What do you expect to see?
Yes. Try the reset button.
Failing that, then uninstall MSI Afterburner and do not reinstall it.
Determine if memory remains at 3500 and also remains stable.