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Overheating CPU on First Boot Up of Day.

SunChief

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Hi all! PC Noob here, so please keep that in mind with any advice given :D

So I got this PC prebuilt for me from Wootware late January/early February. Everything was fine until winter rolled through. On cold days, there seems to be a delay in response time for the actual pump of the AIO to start doing its job, as the fans themselves do turn on immediately. The CPU then starts to overheat to dangerous levels.

It's worth mentioning that:
- The issue is not consistent and I can't reproduce it at will. If it does happen, it is only on the first boot up of the day. It doesn't seem to happen on warm days.
- When the issue does occur, it often resolves itself after a few minutes of the AIO fans going wild or after I reboot the system. Unfortunately today was the first time it didn't resolve itself and just shat the bed and shut itself down.
- I have monitored my system processes and there doesn't appear to be any particular system process causing this spike in CPU temp during these events that differs from any normal startup.
- Once the issue is resolved, the AIO works perfectly fine.
- The PC case is well ventilated and my general CPU temps are pretty standard (41-44 on a hot day; 37-39 on a cold day).
- The PC was stress tested in store before shipping.

My first thought was that it could be a failing pump, but if that were the case, surely the issue would be more consistent and the AIO wouldn't continue to work perfectly fine for the rest of the time? Could it be an problem with the general thermostat settings in BIOS perhaps? I'm thinking that when the parts are cold, it's not registering that the CPU is getting too hot?

I've been struggling to find any useful information online, so I turn to you. Theoretically, what could be the issue here? Is it more likely hardware or software related? I'm worried the problem gets worse before I manage to solve it.


Specs:
- Mobo: Gigabyte GA-B650-GAMING-X-AX
- CPU: AMD 100-100000910WOF Ryzen 7 7800X3D 5.0GHz
- AIO: ID-Cooling ZoomFlow 360 XT 360mm
- RAM: G.Skill F5-6000J3038F16GX2-TZ5NR Trident Z5 NEO RGB 32GB (2x16GB) DDR5-6000MHz CL30 1.35V
- GPU: XFX Radeon RX 7900 XT Speedster MERC 310 RX-79TMERCU9 20GB GDDR6
- PSU: Super Flower SF-1000F14MP Leadex SE Platinum 1000W 80 Plus Platinum
- Storage: Kingston SKC3000S/1024G KC3000 1TB PCIe 4.0 x4 NVMe M.2 2280
 
How is the wiring setup for the cooler? As in did you check and confirm pump is connected to the pump PWM on the board, are the fans running to a splitter which is connected to the CPU PWM on the board?

You can also check the BIOS settings at your FAN / PUMP curve settings. Try set it to full power and see what it does then go back down to "normal" and then like the "eco / silent" profiles or create your own setup. Of course, windows side of things, Fan Control works like a dream as well but that will be when you are in Windows.
 
Also check what the fans are using as a temperature reference to actually start spinning.
Ooo! Yes this as well. This is one of the reasons Fan control is nice. you can set certain fans to use different temp sensors to control the PWM of the FANS. Eg: GPU getting too hot? Set the front fans to use the GPU temp sensors to ramp up when the card gets hotter.
 
Thanks guys!

I'm not too sure about the wiring configuration but it looks correct and the AIO is plugged into the "CPU FAN" header.

Would those temp sensor settings affect when the actual pump of the AIO kicks in itself? As I mentioned before, the AIO fans do turn on and react (wildly) when the issue occurs. It's not really a case of the fans not reacting in time, but more the fans working and nothing happening as far as cooling goes.
 
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It sounds like either a failing pump, or whatever is providing power to the pump is failing.

This won't necessarily be consistent. Things can deteriorate slowly over time before failing completely, which sounds like what's happening to you.

If it's still under warranty then just contact Woot.
 
@SunChief check this link from images from Gigabyte support page - User manual on page 22 Section 5 (Board image - look at the left side of the pic). The board has a CPU water cooler header.

Your pump should be connected to that header. The fans can then be connected to the CPU FAN with a splitter or CPU FAN, CPU OPT FAN and so on if you don't have a splitter. Deep Cool has a nice cheapy one for like R100 or so at Progenix (I have two of them running 3 fans each in my setup without issue)
 
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@limadelta26 Thanks, I've looked and the pump is connected to that header as well yeah.


Thanks everyone. Looks like I'll contact Woot and see what they can do for me!
 
Deep Cool has a nice cheapy one for like R100 or so on Takealot (I have two of them running 3 fans each in my setup without issue)
Cough cough.

 
Update: I went into the BIOS and it looks like the header the actual pump was plugged into (SYS_FAN_3_PUMP on my board as per the links from @limadelta26) was indeed actually set to take temperature from the system, rather than the CPU itself.

I changed it to read from the CPU. Will give it a couple days to see how it fares and report back.

Thanks once again for all the help everyone! 🦾🫶
 
Update: I went into the BIOS and it looks like the header the actual pump was plugged into (SYS_FAN_3_PUMP on my board as per the links from @limadelta26) was indeed actually set to take temperature from the system, rather than the CPU itself.

I changed it to read from the CPU. Will give it a couple days to see how it fares and report back.

Thanks once again for all the help everyone! 🦾🫶
I would suggest setting this header to be on 100% fan speed permanently - unless the pump supports varying pump speeds.
 
Update: I went into the BIOS and it looks like the header the actual pump was plugged into (SYS_FAN_3_PUMP on my board as per the links from @limadelta26) was indeed actually set to take temperature from the system, rather than the CPU itself.

I changed it to read from the CPU. Will give it a couple days to see how it fares and report back.

Thanks once again for all the help everyone! 🦾🫶
Yea this change will help a lot. I still say grab one of those DeepCool Splitters and run your 3x 120mm FAN from the CPU FAN header so you can take advantage of the correct PWM setup. The little double sided glue / tape strip thingy works extremely well so you can hid this away very well inside the case on the back side of the board and the actual cable is flat so you can get some nice tight bends in it for cable management.
 

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