As far as idle temperature goes, 40C with a 360mm AIO seems high on a stock 5800X. To compare I am running on total air cooling, as listed I have 6 140mm TT Ring RGB fans and I have a NH-U14S for my CPU cooler (two of those TT fans are on the tower cooler in push / pull). My system is overclocked. My standard 24/ 7 overclock is 4.675Ghz CCD0 and 4.6Ghz on CCD1 and I am rocking the Crosshair VIII Dark Hero so I have my Dynamic Overclock Switcher set to 45amps, PBO set with curve optimization for my two strongest cores of CCD0 so I have single core boost speed of 5.125Ghz on those two cores. With this overclock in CB R20 I score 644 - 650 single core and 9260 - 9300 multi-core for perspective. The hardest I can push my system on my current cooling is 4.7Ghz all core with the same Dynamic Overclock Switcher single core boost. I still have some headroom on this processor, but without better cooling 4.7Ghz is my limit, and under full load I hit 83C. With my normal 24/7 overclock at full load I hit 76C and my normal idle temperature is between 30 - 32C. I have verified these temperatures using HWMonitor, HWinfo64, and Ryen Master all of which report temps within 1C of each other.
I am running a 5900X, so I have 4 more cores and 8 more threads, and I am running a robust overclock. My Noctua air cooler is considered to be about equal to normal AIOs, but not better than them in cooling performance. I use Thermal Grizzly Kryonaut, and I use the spread technique (I actually use a thermal compound spreader and apply a thin layer to the entire processor).
Still trying to figure out how to post images here, but I do have this validation. This was my 24 / 7 overclock before I overclocked CCD0 to 4.675Ghz and was running 4.65Ghz all core:
https://valid.x86.fr/5d32t2
I was running an older version 3.31.81. Now updated, thank you for mentioning that.
I did some more testing to see if I could get a bsod, I ran Cinebench R23 multi core test, which was running the test over and over again stressing the cpu at 100% for 10 minutes straight. I got no bsod and everything seemed very stable, the whole time I was running this test I had all my usual apps open in the background, namely wallpaper engine, msi afterburner, nzxt cam, icue, discord, steam, logitech ghub, spotify.
I was monitoring the temps with Hwinfo (CPU CCD1) and the maximum peak temperature was 83c, mostly I've seen the temperature at about 77c, the "current" temp went back to around 45c pretty much right after the test was done.
My pump is set to always be between 90-100%, as suggested and I've set the radiator fans to never go past 75% (45% at 60c, 75% at 82c).
The time that I did have a bsod in wolfenstein, my cpu was only using 30-50% and the temps were already jumping over 85c literally after just 3min in game so theres definitely a huge improvement after doing all the things that were suggested to me so far.
Whilst my idle temps are high, it seems that it's caused by the amount of programs I have open in the background.
When I exit out of everything thats running in the background except microsoft edge (with 2 tabs open) and hwinfo, hwinfo is showing the cpu ccd1 temp as 35-37c (likely would be lower if the liquid wasn't warmed up by the earlier testing), the task manager is showing the cpu usage constantly between 0 and 1% and the clocks jump around from 2.7 to 4.1Ghz on the ryzen balanced power plan with 5% min processor state.
My main issue that caused a bsod and crazy high temp spikes in Wolfenstein seems to have been fixed by cleaning the rad and/or updating the bios, the high idle temps seem to be caused by all the software that I have running in the background, which doesn't worry me as much since under load the cpu seems to handle itself alright. I haven't went through the hassle of reinstalling windows, but I have a really big feeling that if I did, as soon as I reinstall all my software and set everything back to normal, I'm gonna have the high idle temps again.
Thanks for all the help provided.
Side note: to post images here I just post a link from imgur (drop the saved image on imgur website, then click hidden and copy the link).