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I did not ask what the 4 connections of a PWM fan are, I asked what the 4 connections and hopefully an explanation of what is coming off of the aquaero 6 lt board so I can see if there is an easy way to modify. I couldn't find a schematic or block diagram of the aquaero 6 lt.You ask for solutions and will "design an pcb" to solve the problem, but you don't even know the four connections of a pwm fan?! How will that end up then?! Hilarious.What are the 4 wires coming off the fans 1-4 on the aquaero 6 lt? There should be +12V, GND and what are the other two wires?
Thank you for showing me the information I needed. The manual that came with my Aquaero 6 lt did not have this information. I can post a photo if you'd like. Like I said, there must be something lost in translation because I have just been asking questions to try to find a solution, I did not mean to come off with a harsh tone.I'm trolling?! You are the person not excepting the issue.
And your question makes no sense too. If you know the wires of a pwm fan, you know the connections of the connectors.
And how about looking into you manual you got with your product? Page 8. And because of your always harsh tone: rtfm.
https://aquacomputer.de/handbuecher.html…o_6_english.pdf
It sounds like I can just redesign my own splitty9 and add a +12V to 5.5V switching regulator and then a 5.5V to 5V LDO and this should solve the issue.
This is good. Thank you for supplying this information. What are the 4 wires coming off the fans 1-4 on the aquaero 6 lt? There should be +12V, GND and what are the other two wires?Look, I just came here for facts and was met with rude words and hostility. I am waiting to hear back from Noctua but in the mean time, I wanted to see if there was a way to design a solution myself.
Instead of just explaining the exact issue, I was met with rude and hostile responses, coupled with condescending attitudes so now that I know how support reacts when I have an issue, I will be returning my entire aquaero setup.
Thanks
*EDIT*
It sounds like I can just redesign my own splitty9 and add a +12V to 5.5V switching regulator and then a 5.5V to 5V LDO and this should solve the issue.
The 4-pin fan specification is in fact very old and outdated so some things are not clearly specified, this is where all this mess comes from.
The 4-pin fan specification is in fact very old and outdated so some things are not clearly specified, this is where all this mess comes from.
The last Intel PWM specification from 2005 is very clear. There's actually no room for special solutions like those from Noctua or EK.
Intel Spec: 1.3 from 2005
This signal must be pulled up to a maximum of 5.25V within the fan.
Totally! But intel came up with this standard and mainboard and fan manufacturers adapted it. So they all (more or less) rely on that standard that intel invented. Nobody forced them, it was just a practical solution.And there is also a question why it is Intel that should make standards […] from moral standpoint Noctua is as entitled to propose standards as is Intel
Totally! But intel came up with this standard and mainboard and fan manufacturers adapted it. So they all (more or less) rely on that standard that intel invented. Nobody forced them, it was just a practical solution.And there is also a question why it is Intel that should make standards […] from moral standpoint Noctua is as entitled to propose standards as is Intel
But Noctua/EK didn't created their own standards, as they could do. They want to create pwm fans for a widely available system, but not keep on the specifications. So i would love to see an own standard of them, but it would be hard to convince manufacturers of a second system for fan control.
My solution is not nonsense. It fixed the issue. It probably is overly complicated but I can provide a clean +5V signal myself. The resistor is a good idea thank you. Just need to make sure that the resistor is the right size so that it does not exceed the +6V intel PWM spec.It sounds like I can just redesign my own splitty9 and add a +12V to 5.5V switching regulator and then a 5.5V to 5V LDO and this should solve the issue.
I do not fully understand your plans but it seems to me to be nonsense. You can try to add a 4,7kOhm resistor or maybe also a 1k resistor between VCC (12V) and the PWM Signal pin. This could solve the issue but can also kill other fans so you need to be careful.
This is like adding a spring to the pedal I described.
Good idea. I was trying not to void my fan warranty by opening it up but I guess providing my own clean +5V signal also probably voids the warranty so I have nothing to lose.This is good. Thank you for supplying this information. What are the 4 wires coming off the fans 1-4 on the aquaero 6 lt? There should be +12V, GND and what are the other two wires?Look, I just came here for facts and was met with rude words and hostility. I am waiting to hear back from Noctua but in the mean time, I wanted to see if there was a way to design a solution myself.
Instead of just explaining the exact issue, I was met with rude and hostile responses, coupled with condescending attitudes so now that I know how support reacts when I have an issue, I will be returning my entire aquaero setup.
Thanks
*EDIT*
It sounds like I can just redesign my own splitty9 and add a +12V to 5.5V switching regulator and then a 5.5V to 5V LDO and this should solve the issue.
It sounds overcomplicated. As there is never more than a few mA sourced from pin 4, You will be fine with a cheaper and less problematic linear regulator (7805). I would rather generate 3,3 V (with a 78L33 for example) for pull-up, just to be on the safe side (the pin 4 may be internaly pulled to 3,3 V as it is recommended for newer designs). However, since Noctua suggests push-pull drive for pin 4, You should be fine with pulling up to 5 V anyway.
Actually, if You're no stranger to electric engineering you could open the fan and check exactly what they have done. Noctua says in their white paper that the pin 4 is indeed pulled up internally but they do not say to what voltage (in fact they say 5 or 3,3 V). The pull-up resistor value is certainly to big to act efficiently as a pull-up in this configuration (proably way over 100 kOhm - this is an indirect conclusion coming from observation of this forum and the Noctua whitepaper itself). Even worse, I suspect that the value of this internal resistor may vary between fan revisions.
The 4-pin fan specification is in fact very old and outdated so some things are not clearly specified, this is where all this mess comes from.
Do the Artic fans work properly with Aquaero pwm?The 4-pin fan specification is in fact very old and outdated so some things are not clearly specified, this is where all this mess comes from.
The last Intel PWM specification from 2005 is very clear. There's actually no room for special solutions like those from Noctua or EK.
Intel Spec: 1.3 from 2005
This signal must be pulled up to a maximum of 5.25V within the fan.
Do the Artic fans work properly with Aquaero pwm?The 4-pin fan specification is in fact very old and outdated so some things are not clearly specified, this is where all this mess comes from.
The last Intel PWM specification from 2005 is very clear. There's actually no room for special solutions like those from Noctua or EK.
Intel Spec: 1.3 from 2005
This signal must be pulled up to a maximum of 5.25V within the fan.
https://www.arctic.ac/us_en/p12-pwm.html
https://www.arctic.ac/us_en/p14-pwm.html
If you supply fixed +5V to the PWM signal there are two things that can happen:
1. You are not able to control the fan as the controller will not be able to pull down this voltage to GND. So the fan can not be controlled.
2. If the controller is not protected by a inline resistor it can burn.
If you like to add a external voltage you need to supply it with a resistor (4k7 for example) to the circuit.
As we would like to be as compatible with our products as possible we are currently developing a solution for this problem that can adjust to the wrong fan behaviour.
Currently these issues have only be confirmed with Noctua fans. And it looks like Noctua has provided different kind of PCBs at the same fans so this is really somehting very strange. I still believe they did a mistake and then did this whitepaper to describe the issue. But that is something you need to discuss with Noctua. I don't find any engineering reason why to change this. Even at industrial devices (for example CNC, SPS) it is common to control devices with NPN signals why the device supplys the control voltage.
At EK fans we found issues that if you combine the RPM signals of the fans (which happens at many splitters like SPLITTY9) the PWM control of the fans will fail. We haven't investigate deeper in this issue. This can simply be solved by removing the pin from the connectors.
In total > 99,9% of all PWM fans will work with our hardware perfectly.
If you supply fixed +5V to the PWM signal there are two things that can happen:
1. You are not able to control the fan as the controller will not be able to pull down this voltage to GND. So the fan can not be controlled.
2. If the controller is not protected by a inline resistor it can burn.
If you like to add a external voltage you need to supply it with a resistor (4k7 for example) to the circuit.
As we would like to be as compatible with our products as possible we are currently developing a solution for this problem that can adjust to the wrong fan behaviour.
Currently these issues have only be confirmed with Noctua fans. And it looks like Noctua has provided different kind of PCBs at the same fans so this is really somehting very strange. I still believe they did a mistake and then did this whitepaper to describe the issue. But that is something you need to discuss with Noctua. I don't find any engineering reason why to change this. Even at industrial devices (for example CNC, SPS) it is common to control devices with NPN signals why the device supplys the control voltage.
At EK fans we found issues that if you combine the RPM signals of the fans (which happens at many splitters like SPLITTY9) the PWM control of the fans will fail. We haven't investigate deeper in this issue. This can simply be solved by removing the pin from the connectors.
In total > 99,9% of all PWM fans will work with our hardware perfectly.
Ok thank you for the information and thank you for working on a solution.
Just to clarify, I was providing 5V to PMOS/NMOS configuration described in the noctua white paper. I agree, the resistor is a good idea for noise reduction/limiting current.
Noctua is taking their sweet time getting back to me on a potential fix so I may just go with the artic fans. They look great and are 1/3rd the cost
It sounds like I can just redesign my own splitty9 and add a +12V to 5.5V switching regulator and then a 5.5V to 5V LDO and this should solve the issue.
You can try to add a 4,7kOhm resistor or maybe also a 1k resistor between VCC (12V) and the PWM Signal pin.
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