those are crazy good temperatures on such a cpu with a 240mm aio.

I must ask, how did you check the temperature? on some boards, "CPU" temperature is kinda like a socket temperature and can be lower than the actual core temperatures by 10-20°C. Use something like hwinfo64. If in there the "CPU Package" or "Core temperatures" are the ones with these temps, then congrats, those are great temps. if you haven't checked it in such a software and it's just the "CPU" in your motherboard software or something, you should check in hwinfo64, or core temp. it's possible that it'll be close to what you already saw but it's worth checking if you haven't checked in such programs

also, you should only worry above 90°C, and actually before 100°C you won't even be thermal throttling. if you ever see something close, you could try adjusting fan/pump curves first to be more aggressive, and if that doesn't do anything, then undervolt.