Someone suggested I post this here as opposed to AMDreddit. I wasn't looking for help or anything, just found it fascinating it got so high. I hadn't set any alarms because I wasn't expecting this, but have since done so. As such, I have no idea at what point this occurred, so I can't say exactly what was going on at the time. It's a new SFF build so I expected things to get a tad warm, but it looks like the southern heat wave has crept into the case.