Thanks Pete - I don't know if it shows up or not - and thanks for the reminder about HW Monitor - had it on my system for 2 years, quit using it in favor of RealTemp360.
Anyway using HWMonitor, under Temperature I have CPU
. I guess the VR circuit isn't one of them...?
Here's a screenshot of what HWMonitor gives me:https://imageshack.com/i/n6l75svjNot much info googling around - nobody seems to know since every board/system is different.
Found some info on MSI's forum - seems like TMPIN1 is the IOH. Folks are expressing similar concerns over high temps with water-cooling; they're saying pull apart the heatsink/pipe and replace the TIM. I don't know if it's that critical though - I cranked up the cores, that sensor went to 75C. Unless I see 90C+ I doubt I'll worry about it.
I found Intel's Thermal and Mechanical Design Guide for X58 - interesting reading but not so helpful - unless I can reference the Tcontrol value for the IOH, which isn't exactly the same thing as the VR circuit but maybe close enough?