i7 13700K at 100°C with AIO

[Handy Bag]

Hi everyone,
Asking for help even if I already know the answer. I've built a pc in the Cooler Master nr200p max case (with integrated AIO and power supply). I've built plenty of PC, but it's my 1st in mini-ITX format, and the 1st with AIO cooler, and maybe I'm doing something wrong.

When I boot the PC, it's all working well, but the CPU's temp goes through the roof in 5 minutes, up to 100°C, so I suspected an AIO issue. When I go to BIOS, the PUMP_FAN (the header where the pump is connected) shows 0 RPM. It's the same when I plug the pump on CPU_FAN or SYS_FAN. Of course I hear no sound coming from the pump while the PC is running. So I guess the pump is not working ? Maybe I've forgot to activate something or I don't know what.

Things I've already check/done :
- Change thermal paste twice
- Check if screws where to tightly screwed
- Check if I removed the plastic layer on the copper plate of the AIO
- Tested every fan pin on the mobo with another cooler

If you have any advice or idea on what is preventing the pump to run, I'll be happy to hear from you

Thank you

[_I_]

pump should be 100% to keep the fluid moving and mixed
let the fans cool the rad dynamically

[Bad 💀 Motha]

Why would anyone set a Pump to run off of PWM. If you must do this then go into the BIOS and set that header to DC. Or PWM Disabled.

[Julien, cut it out.]

You don't need to run the pump at the highest RPM. Run it at your covenience regarding noise as long as temperatures are fine.
The range of ± 10% at 3100 RPM is anyway minimal. (50% PWM ~ 3'178 RPM)

You can leave it in PWM configuration.

[Guydodge]

Originally posted by among us:

Originally posted by _I_:

make sure the pump is at 100% all of the time
use a sata or molex power connector and adapter for it to ensure it is

put the aio fans on the cpu fan header

this will literally break the pump
you never run the pump at 100%

nonsense.. been running my AIO water pumps at 100% over10+ years

[PopinFRESH]

Originally posted by Julien, cut it out.:

You don't need to run the pump at the highest RPM. Run it at your covenience regarding noise as long as temperatures are fine.
The range of ± 10% at 3100 RPM is anyway minimal. (50% PWM ~ 3'178 RPM)

You can leave it in PWM configuration.

You are wrong.

Originally posted by Amuro0079:

Originally posted by Bad 💀 Motha:

Correct; this is why Motherboard makers started putting a labeled fan head for "PUMP"
This will only run DC mode and thus runs the pump @ 100% at all times like it's supposed to.

AIO Pumps were never designed to run dynamic RPMs. Think about it; why would I want the Liquid Flow to ever be slowed down? How does that make any sense. Cause if you put an AIO Pump on PWM, that's exactly what you are doing to it; which you never want to do.

You can manually control all Case and Rad Fans though; that is perfectly fine.

My EK Nucleus 360 Lux AIO pump is 4-pin PWM and is plugged into the pump header.

Pump Speed Range: 3100 RPM ± 10%
Pump PWM Range: 20 - 100%

I had it set to PWM mode and run at 50% in BIOS for temperatures lower than 75C. Is this OK?

Follow what the manufacture[www.ekwb.com] has told you in the manual for your pump...

Originally posted by EK:

8. You must not run the pump below 20% RPM. The pump must stay within a 20-100% PWM
duty cycle at all times. We recommend always running the pump at 100%. (For help on how to
control the PWM, please refer to your motherboard instructions.)

Set the PWM for the pump header to 100% PWM in BIOS.

[Agent]

This is normal. Intel is supposed to act as your space heater alongside gaming :)

[Guydodge]

Originally posted by Stacked:

This is normal. Intel is supposed to act as your space heater alongside gaming :)

funny story AMD runs hotter !!!

[Guydodge]

alot of misinformation in this post sounds like the pump is bad have them replace it.

[Agent]

Originally posted by Guydodge:

Originally posted by Stacked:

This is normal. Intel is supposed to act as your space heater alongside gaming :)

funny story AMD runs hotter !!!

Depends on the chip, but zen 4 Ryzen 7's are cooler than i7 raptor lakes. The same is also true for their mobile chips used on laptops. Zen 4 running 10 to 20c cooler on average.

[PopinFRESH]

Originally posted by Guydodge:

alot of misinformation in this post sounds like the pump is bad have them replace it.

The OP already did and has been working since June. Cashcow necro'd the thread post-solution.

[Julien, cut it out.]

Originally posted by PopinFRESH:

Originally posted by Julien, cut it out.:

You don't need to run the pump at the highest RPM. Run it at your covenience regarding noise as long as temperatures are fine.
The range of ± 10% at 3100 RPM is anyway minimal. (50% PWM ~ 3'178 RPM)

You can leave it in PWM configuration.

You are wrong.

You suppose I'm wrong based on the recommendation of EX or is there any other reason?
The difference in the flow speed of the cooling solution at 3100 RPM with a range of ± 10% is neglegible.

Via PWM, you can use f.e. aquasuite to create a variable RPM configuration for the pump based on CPU/ GPU load. With such a minimal range in RPM of the EX Nucleus, that's imo not worth it.

There is no reason for the pump to run at its highest RPM all the time, as some suggest.

[PopinFRESH]

Originally posted by Julien, cut it out.:

Originally posted by PopinFRESH:

You are wrong.

You suppose I'm wrong based on the recommendation of EX or is there any other reason?
The difference in the flow speed of the cooling solution at 3100 RPM with a range of ± 10% is neglegible.

Via PWM, you can use f.e. aquasuite to create a variable RPM configuration for the pump based on CPU/ GPU load. With such a minimal range in RPM of the EX Nucleus, that's imo not worth it.

There is no reason for the pump to run at its highest RPM all the time, as some suggest.

No, I suppose you are wrong because you seem to think a PWM 50% dutycycle is 3178RPM.

And yes, I will also take EK's (along with the majority of other manufactures) suggestion to run the pump at full speed all the time, like it is designed to be, over your clearly lacking in knowledge opinion.

[Julien, cut it out.]

Yeah, you're right. I'm absolutely wrong with the calculation and subsequent conclusion. Sorry!
I should know better.

[PopinFRESH]

Originally posted by Julien, cut it out.:

Yeah, you're right. I'm absolutely wrong with the calculation and subsequent conclusion. Sorry!
I should know better.

No worries, genuinely appreciate you being willing to admit it and going back and using the strike formatting so as to correct your posts without "hiding" the original content. Bravo.

Also for additional context, the rate of circulation, as long as it is sufficiently fast, is not going to increase or decrease the temperature / heat rejection. While there will be an "instantaneous" Delta-T when measuring the inlet and outlet at a radiator; when viewing it as a system the fluid temperature will be considered "uniform" throughout. Once you've reached a steady state where the radiator and device blocks have fully heat-soaked, the only thing meaningfully acting on the temperature of the system is the capacity of the air flowing across the radiators fin stack. What the rate of circulation will impact is the "response" or "lag" in how quickly a change in device temperature induces a change in radiator temperature when you haven't reached steady state; as well as too low of a flow rate will result in other fluid dynamics issues, such as the difference between laminar flow and turbulent flow in the context of liquid cooling.

So your other assertion that running it at a slightly slower duty cycle isn't going to make much of a difference is more or less correct once the system has been on for a while, as long as the speed is sufficient to maintain turbulent flow and is at a rate faster than the fluid mediums heat capacity saturation. However, there really is no reason to not set the pump at 100% duty cycle. The pumps, even variable speed pumps, are designed to run at full speed.

[MonkehMaster]

Originally posted by PopinFRESH:

Originally posted by Julien, cut it out.:

You suppose I'm wrong based on the recommendation of EX or is there any other reason?
The difference in the flow speed of the cooling solution at 3100 RPM with a range of ± 10% is neglegible.

Via PWM, you can use f.e. aquasuite to create a variable RPM configuration for the pump based on CPU/ GPU load. With such a minimal range in RPM of the EX Nucleus, that's imo not worth it.

There is no reason for the pump to run at its highest RPM all the time, as some suggest.

No, I suppose you are wrong because you seem to think a PWM 50% dutycycle is 3178RPM.

And yes, I will also take EK's (along with the majority of other manufactures) suggestion to run the pump at full speed all the time, like it is designed to be, over your clearly lacking in knowledge opinion.

yes, im sure they want you running it at 100% 24/7, this way it burns up quicker and you buy another.