I think it's a bit more aggressive than what you posted but not quite sure, I didn't change anything as I'm tired and would mess things up, just looked, took pics and exited without saving, I did notice the aio pump reads na but I'm assuming that's because the arctic has a fan so it's plugged into a fan header.aio looks fine in terms of mounting
at this point if youve been running it a while it could be the thermal paste has dried up
its either 1 the pump is dieing ( quite common on aio)
2. the paste has dried up or incorrectly applied.
im going to go with failing aio.
reason even if the game was pinning the 1 cpu to the wall that shouldnt matter if the cooler is doing its job
the max your cpu is hitting is 1.3v that should be nothing for that aio.
as someone suggested the fan curve could be to low this is easily fixed
if you go into bios look for cpu fan curve set fans at 75c 100 percent
i usually set my fan curve
30c 30 percent
45c 50 percent
65c 75 percent
75c 100 percent
a example is the cpu fan curve in bios could be set to 100 percent fan speed at 90 which by then the cpu is climbing. till it hits 90.
if fixing fan curve does nothing then its most likely a dieing pump or paste has dried up.
played today after redoing config files (one config fle has my cpu set to 9 cores so i believe that was what was causing all the fps issues but not so much heat after gaming today .) these are my temps after 2.5-3 hours consecutive with stream running , it was at 80 until i minimized the game and opened up opera browser, also very warm in the house and muggy , 74 with 80% humidity , averages are great but max are what scares me, i know you said dont fret unless im throttling its just i have 2 -2.5 years in saving to even have this pc, all my fan curves are agressive in bios and pumps set to 100In general if you never see a thermal throttle condition the machine is having no issues it is running at its maximum rate and not being limited.
Even if you were to hit the thermal throttle limits the machine itself is still safe that is the purpose of the limit. The actual temperature that will damage the cpu is higher than the point it limits itself. There is another safety feature that will turn off the cpu if it would somehow get above the first throttle limit.
If you constantly run at the thermal throttle limits and you think the load you are running should not be doing that you then consider trying to "fix?" it. You can remove the heat sink and replace the paste and clean all the fans etc. Not really worth the risk of damaging something unless you have a actual issue.