Question Very weird temperature behavior

Sep 13, 2023
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Hello everyone,

I searched around and couldn't find any previous issue reported quite like mine.
Recently purchased a new RTX 4080 and an Arctic AIO Liquid Cooler, had them installed on a new Cooler Master HAF 700 case because my previous AIO cooler and GPU got damaged (glass of coke got dumped on my old case's top ventilation grid and it got on the inside of both). I fixed and cleaned both as much as I could, and it worked perfectly fine for months. However, I changed these 2 parts as I wanted a new GPU and I was getting some annoying high temperatures on some games and I attributed that to my old AIO and case.

Fast forward to getting everything put in place and installed, I turned on my PC and my fans start spinning like they're gonna take off orbit. I wait a bit until it loads to see if it calms down but it keeps going at peak speeds. I go to open MSI Afterburner to check temps and I'm completely shocked. All temps look perfectly normal expect for CPU which is at a whooping 95 C, which is insane, and this is at idle without me opening a single app.

Opened task manager, CPU usage is at 10%, nothing abnormal. I open Chrome and some games to test and the temp goes even higher, I even got a blue screen error for CPU temp once. While testing, I randomly decide to open Steam and try to start Baldur's Gate 3, and my PC suddenly goes deadly quiet. I go and check the temperatures, and lo and behold it's now down to 35 C. Once again I'm speechless so I go ahead and close the game, close Steam and close every single other app I have opened to see if the temps go back up to crazy and no, they go even lower into the 20's.

I checked and all the fans are spinning as they should. Checked thermal paste, even spread it a little bit more as it wasn't covering all corners. This issue happens every single time I restart now, and every single time I can fix it by starting BG3. I haven't tried with other Steam games but this is weird enough on it's own.

Obviously I don't think it's the game that's "fixing" my issue but there must be some weird software interaction that's causing this but I have absolutely no clue what it could be.

My specs:

CPU: i9-12900KF
GPU: Nvidia RTX 4080
MB: Asus PRIME Z690-P D4
32GB RAM
Arctic Liquid Freezer II 360 cooler

Can anyone help me try to make sense of this?

TL;DR: Extremely high temperatures while idle during startup and while browsing and using some games, but it instantly goes down to normal and stays down after starting a specific Steam game: Baldur's Gate 3.
 
Welcome to the forums, newcomer!

Can you include an image of how your AIO is oriented in your system/case? BIOS version for your motherboard at this moment of time? Ambient room air temps?
Hey! Sure thing, here it is:
AIO: View: https://imgur.com/a/BvU77ui

BIOS version: UEFI American Megatrends Inc. 0404, 9/10/2021
SMBIOS version: 3.4
Ambient room: Currently 16 C

There's an update available for 2023 for the Z690-P Wifi Asus MB. I downloaded it and have it on my USB but I'm a bit nervous of bricking my PC as I've seen some horror stories about BIOS updates before. As far as I'm aware, this was not happening with my previous setup and I had this same BIOS version at that time.
 
Last edited:
*UPDATE*
This is still happening, and it's still 100% replicable.

Went to turn off my PC yesterday and it said I had available Windows updates so I selected the option to "Install and then shutdown". When I did and the PC went to the "Installing updates" screen, the fans started speeding up again and it appears it was overheating once again, but this time I couldn't do anything about it since it was installing updates.

After it restarted itself to finish installing, it instead went to the BIOS screen and gave me an Overheating CPU warning (it was showing up at 88 C). Had to exit and pray that it finished installing the updates so I could turn it off and thankfully it did. However this show that what's causing this is something before it even gets to anything Windows related as it's overheating even during BIOS.

Later today I'll try some things I read like making sure the connections for my AIO are properly plugged in the right spots, etc, but since my cooler works exceedingly well only AFTER I start Baldur's Gate 3, then I don't think it's a mechanical or hardware issue.

If someone can think of anything I can try, please help me, I'm running out of ideas here.
 
curious it doesn't have any software controlling it - https://www.arctic.de/en/Liquid-Freezer-II-360/ACFRE00068B

Your motherboard doesn't appear on list of boards with problems - Its possible problems are clearance, it doesn't say. I don't know which revision you have so perhaps you do - Manual links - https://support.arctic.de/en/lf2-360

Manual might say something helpful

Could try this, see if its another program in windows
Try a clean boot and see if it changes anything - make sure to read instructions and make sure NOT to disable any microsoft services or windows won't load right - https://support.microsoft.com/en-au/help/929135/how-to-perform-a-clean-boot-in-windows

It doesn’t delete anything, it just stops non Microsoft programs running with start. Easy to reverse.

if clean boot fixes it, it shows its likely a startup program. You should, over a number of startups. restart the programs you stopped to isolate the one that is to blame.
 
Have you checked your AIO's pump?
I did, I couldn't feel it hot while it was running or anything but since it works exceedingly well and my CPU goes to under 30C only AFTER I start that particular game, I don't think it's anything related to hardware. I also re-applied thermal paste, made sure there was no plastic in-between the plate and CPU and everything else I could think of hardware wise.
 
curious it doesn't have any software controlling it - https://www.arctic.de/en/Liquid-Freezer-II-360/ACFRE00068B

Your motherboard doesn't appear on list of boards with problems - Its possible problems are clearance, it doesn't say. I don't know which revision you have so perhaps you do - Manual links - https://support.arctic.de/en/lf2-360

Manual might say something helpful

Could try this, see if its another program in windows
Try a clean boot and see if it changes anything - make sure to read instructions and make sure NOT to disable any microsoft services or windows won't load right - https://support.microsoft.com/en-au/help/929135/how-to-perform-a-clean-boot-in-windows

It doesn’t delete anything, it just stops non Microsoft programs running with start. Easy to reverse.

if clean boot fixes it, it shows its likely a startup program. You should, over a number of startups. restart the programs you stopped to isolate the one that is to blame.
Thanks for the reply, I'll try this when I get off work later today and update after.