Question CPU water cooling pump is extremely loud during Windows startup (100%)/boot after updating BIOS ?

[dnbrules]

Motherboard: ASRock X670E Pro RS

Hi guys, i need help pls :/ after updating to BIOS version 3.20, the water cooling pump on my cpu (AMD Ryzen 7 7800X3D + Fractal Lumen S36 AOI) is activated extremely agressively/loud during Windows startup, for about 2-3 seconds. After that, everything runs normal... but think this could damage the pump permanently after some time... i need to fix this somehow. -any ideas?

Is it possible that the pump is receiving too much voltage and is therefore pulling so hard when starting?
The problem didn't occur with my previous BIOS version. Everything seems a bit strange.


The mainboard has no direct connector for the pump. I built the PC with a friend and he said the pump would have to be connected to cpu_fan2/WP Switch.
Here are the current settings in Bios:
CPU_FAN2/WP Switch = W_Pump
Water Pump Control Mode = DC Mode
Water Pump Setting = Customize
Water Pump Temp Source = Monitor CPU

Unfortunately, I'm not very familiar with the whole topic yet and need some help 🙁
Thank you very much in advance (also, sorry for my poor English 😀)

 

[SkyNetRising]

And that is coming from pump?
It doesn't sound like a pump noise.

Could it be noise from some fan?

 

[dnbrules]

Can you record those noises?

->It's definitely coming from the pump.
You're right, the first long, drawn-out noise sounds similar to a fan, followed by a short noise (that's how it was before, just the short/ brief suction noise when booting).
Unfortunately, the ASRock X670E Pro RS doesn't have a pump pin connector. It only has a CPU_FAN1 and a CPU_FAN2 connector. According to the manual, these two are compatible with pumps. I just swapped the connectors for testing, but it didn't change anything.




🤔Now that you mention it, could it be that the pump is mistaken for a fan for a short time, during booting due to some change in the BIOS update?

 

[SkyNetRising]

Now that you mention it, could it be that the pump is mistaken for a fan for a short time, during booting due to some change in the BIOS update?

When you updated BIOS, this also resets BIOS settings.
Your pump/fan settings got reset to defaults.

Pump speed should not be regulated. It should run at constant speed.
Adjust fan speed settings for fan header, where pump is connected.
DC mode, constant speed. Choose speed based on noise levels.
For example, if 100% is too loud for your comfort, then set to constant lower speed like 70% or 50%.

 

[dnbrules]

When you updated BIOS, this also resets BIOS settings.
Your pump/fan settings got reset to defaults.

Pump speed should not be regulated. It should run at constant speed.
Adjust fan speed settings for fan header, where pump is connected.
DC mode, constant speed. Choose speed based on noise levels.
For example, if 100% is too loud for your comfort, then set to constant lower speed like 70% or 50%.

I knew that the settings would be lost, so I wrote everything down beforehand and reset them after the update.

CPU_FAN2/WP Switch = W_Pump
Water Pump Control Mode = DC Mode
Water Pump Setting = Customize -> i will try constant speed, 70% or 50% , will report soon
Water Pump Temp Source = Monitor CPU

 

[dnbrules]

Pump speed should not be regulated. It should run at constant speed.

Hey SkyNetRising,

I set the pump to a constant speed as a test, and it's running. The setting worked, but unfortunately, it doesn't change the drawn-out noise during bootup. You always have to ask yourself what you changed that could have caused this noise... and in this case, the BIOS was updated, so theoretically, that's the only thing that could be causing it. ->Can I safely downgrade to an older BIOS to test whether the noise goes away? Or should I not do that?

This all is so strange and makes no sense—if only there were a logical explanation for it. Well, since the pump and cooling are working perfectly, maybe I should just accept it and stop thinking about it.

 

[CountMike]

Pumps have same type of motor as fans, BIOS has no idea if it's fan or pump. It's treated and speed adjusted same way.

 

[dnbrules]

Pumps have same type of motor as fans, BIOS has no idea if it's fan or pump. It's treated and speed adjusted same way.

Interesting, i thought they were different.

 

[CountMike]

Interesting, i thought they were different.

How PC Fans Work

PCB Heaven! Electronic theory, schematic circuits and PIC tutorials

pcbheaven.com

 

[Ralston18]

Pump noise - resonance?

Some RPM mix of pump and fan speeds as everything starts spinning up...

 

[dnbrules]

Pump noise - resonance?

Some RPM mix of pump and fan speeds as everything starts spinning up...

Hello Ralston18, ty for ur help,

yes, possibly, but this has only occurred since the bios update.

So if pumps and fans have the same or similar motors and you start the pc, it takes about 2-3 seconds until the bios/settings take effect, in this time-span the aio cpu pump is probably controlled like a fan electronically.

I'm just trying to understand it ... as I'm not an electrician, I don't have the experience ... but there must be something misdirected, contact error maybe?

But since the pump can't be damaged by this according to SkynetRising, it doesn't really matter. After windows has booted up, the pump works normal. (pump runs in bios under dc mode) it runs dynamically slower or faster depending on the load/temp. During cinebench at maximum load the temperature goes up to 75 Celsius. So the cooling works very well, i think.

 

[Ralston18]

Regarding that 2 -3 seconds. Could be that that lapsed time is being used to monitor and report the boot process.

Google "computer boot verbose mode". Revise the search criteria as you read and learn.

You may be able to make some change(s) to save that time.

= = = =

My sense is that if all is well (temperatures, rpms, noise) then leave all alone.

AKA "if it ain't broke, then don't fix it."

Likely you would be able to understand it if given more information.

Except that many manufacturers make things not to be repaired or fixed. Designed in EOL (End of Life).

And what goes on behind the scenes becomes "never mind, does not matter, etc...".

Cynicism conceded.

 

[SkyNetRising]

(pump runs in bios under dc mode) it runs dynamically slower or faster depending on the load/temp.

Pump should run at constant speed. It doesn't need to be regulated.
You regulate radiator fans (not pump).