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phyrephox
09-06-2016, 10:58 PM
Hey all,

I have a Phanteks Enthoo Pro and trying to figure out the best way to connect the PWM Hub. I've done a bunch of research and hoping someone can tell me if I'm on the right track or not.

I have the following setup:

Z170X-UD5 for my m/b
Corsair H110i water cooler (comes with 2, 140mm)
1, 140mm back fan
1, 140mm front fan

From the research I've done so far it looks like I have to hook it up this way:

- Plug 3 pin from H110i to FAN 1 on hub
- H110i fans connected to CPU block via 4 pin Y splitter
- Plug 3 pin front fan into FAN 2 on hub
- Plug 3 pin back fan into FAN 3 on hub
- Connect 4 pin CPU FAN from hub to CPU_FAN on m/b
- Do I need the SATA power connection plugged in?

Here's a diagram of the motherboard.

648

A couple of things I'm not sure about. The motherboard manual says CPU_OPT is for water cooling, should I plug 4 pin from hub into this instead? The manual also says all 4 pin fan connections have Speed control so does it matter which one I plug into?

doyll
09-07-2016, 06:21 AM
Hi and welcome to the forum.

I don't know what the fan header pinout is for CPU_FAN and CPU_OPT are, but assuming the are Grd, 12v, rpm & PWM in that order I would use one for your H110i and one for fan hub.
http://phanteks.com/forum/showthread.php?162-Pwm-hub

phyrephox
09-07-2016, 05:43 PM
Hi and welcome to the forum.

I don't know what the fan header pinout is for CPU_FAN and CPU_OPT are, but assuming the are Grd, 12v, rpm & PWM in that order I would use one for your H110i and one for fan hub.
http://phanteks.com/forum/showthread.php?162-Pwm-hub

Hey doyll, thanks for the welcome.

I think the only fan header that has 12v is CPU_FAN and I'm assuming this is to power the fans. The manual says:

1. GND
2. +12v
3. Sense
4. Speed Control

This seems like the order you mentioned above. But for CPU-OPT it's:

1. GND
2. Speed Control
3. Sense
4. VCC

I don't know what VCC is. But, I am guessing that CPU_FAN needs to power the PWM hub, and the CPU_OPT powers the H110i, if it supported +12v. Is there some other configuration I should try?

The fan header specs are on page 26 of the manual:
http://download.gigabyte.us/FileList/Manual/mb_manual_ga-z170x-ud5_e.pdf

doyll
09-07-2016, 11:06 PM
Hey doyll, thanks for the welcome.

I think the only fan header that has 12v is CPU_FAN and I'm assuming this is to power the fans. The manual says:

1. GND
2. +12v
3. Sense
4. Speed Control

This seems like the order you mentioned above. But for CPU-OPT it's:

1. GND
2. Speed Control
3. Sense
4. VCC

I don't know what VCC is. But, I am guessing that CPU_FAN needs to power the PWM hub, and the CPU_OPT powers the H110i, if it supported +12v. Is there some other configuration I should try?

The fan header specs are on page 26 of the manual:
http://download.gigabyte.us/FileList/Manual/mb_manual_ga-z170x-ud5_e.pdf
You are correct.
Only CPU_FAN is PWM controlled

CPU_OPT 2nd pin 'Speed Control' is really the fan power using variable voltage. 4th pin 'VCC' basically means pin in not being used.

You could try using a PWM splitter on the CPU_FAN header to both units. Basic 'Y' splitter will supply PWM signal to both H110 and PWM hub, but only one will supply rpm signal to CPU_FAN header. I'm not sure this will work but can't see how it would hurt anything. Worst that could happen is one will not run properly. Sorry I can't be more help.

phyrephox
09-08-2016, 10:58 AM
You are correct.
Only CPU_FAN is PWM controlled

CPU_OPT 2nd pin 'Speed Control' is really the fan power using variable voltage. 4th pin 'VCC' basically means pin in not being used.

You could try using a PWM splitter on the CPU_FAN header to both units. Basic 'Y' splitter will supply PWM signal to both H110 and PWM hub, but only one will supply rpm signal to CPU_FAN header. I'm not sure this will work but can't see how it would hurt anything. Worst that could happen is one will not run properly. Sorry I can't be more help.

If I use a 'Y' splitter, and only one of the devices will supply rpm signal to CPU_FAN header, will I still be able to control each using a fan curve in a fan control app like Gigabyte's, System Information Viewer?

Is there an alternative solution that doesn't include the Phanteks PWM hub where I can see all the RPMs and control them using a fan curve?

doyll
09-08-2016, 11:53 AM
If I use a 'Y' splitter, and only one of the devices will supply rpm signal to CPU_FAN header, will I still be able to control each using a fan curve in a fan control app like Gigabyte's, System Information Viewer?

Is there an alternative solution that doesn't include the Phanteks PWM hub where I can see all the RPMs and control them using a fan curve?

One control is just one and cannot be split, but that one control signal can be used by more than one fan. A 'Y' splitter sends the same signal to both.

Rudolf Rednose
09-09-2016, 11:15 AM
Hi there,

just about the same question, but with a Gigabyte GA-X99-UD3 motherboard, a Noctua NH D-15 (double fan heatsink) in the Enthoo Evolv atx tempered glass edition case.

How to connect the two cpu cooler fans (4 pins twice) ....I think on the CPU_Fan header with a Y splitter cable.
Is it ok to put the hub cable on any other Fan header on the motherboard?
Will it the hub have to be sata connected aswell, or does it draw power from the motherboard?
Case manual is a bit unclear on this, just expects you to connect the hub to the CPU_Fan header, which seems strange to me.

doyll
09-09-2016, 09:08 PM
Hi there,

just about the same question, but with a Gigabyte GA-X99-UD3 motherboard, a Noctua NH D-15 (double fan heatsink) in the Enthoo Evolv atx tempered glass edition case.

How to connect the two cpu cooler fans (4 pins twice) ....I think on the CPU_Fan header with a Y splitter cable.
Is it ok to put the hub cable on any other Fan header on the motherboard?
Will it the hub have to be sata connected aswell, or does it draw power from the motherboard?
Case manual is a bit unclear on this, just expects you to connect the hub to the CPU_Fan header, which seems strange to me.

Any PWM fan header will control the PWM controlled hub. But according to your manual only the CPU_FAN header is PWM (has speed control on 4th pin).

As far as I know the hub does not have SATA power. But be careful that the total fan power load on header is less then 1 amp.

phyrephox
09-09-2016, 10:25 PM
One control is just one and cannot be split, but that one control signal can be used by more than one fan. A 'Y' splitter sends the same signal to both.

Thanks doyll. I picked up a PWM splitter cable today. The end with 2 inputs has one that is 3 pin and one that is 4 pin. What would you recommend? Should the CPU's H110i be plugged into the 3 pin or 4 pin?

Thanks!

doyll
09-10-2016, 12:34 AM
Thanks doyll. I picked up a PWM splitter cable today. The end with 2 inputs has one that is 3 pin and one that is 4 pin. What would you recommend? Should the CPU's H110i be plugged into the 3 pin or 4 pin?

Thanks!
Try it and see. The 3-pin one does not have rpm signal lead, 4-pin one does. This is so the motherboard only gets one rpm signal and is not confused by receiving rpm signals from 2 fans. Fan headers are only designed to monitor one rpm signal. It's kinda like listening to one person talking instead of two. We can understand what one is saying but two becomes garbled.

phyrephox
09-11-2016, 10:54 PM
Try it and see. The 3-pin one does not have rpm signal lead, 4-pin one does. This is so the motherboard only gets one rpm signal and is not confused by receiving rpm signals from 2 fans. Fan headers are only designed to monitor one rpm signal. It's kinda like listening to one person talking instead of two. We can understand what one is saying but two becomes garbled.

Thanks for the explanation. Quick question: wouldn't this pwm splitter cable approach effectively produce the same results as the approach in my original post? Connect h110i to FAN 1 (master fan), front and back case fans to the PWM hub. Then connect the PWM hub to CPU_FAN on the motherboard.

I could be missing something, in which case please correct me and teach me the differences. I'm very new to this and just looking for the best solution.

Cheers!

doyll
09-12-2016, 12:16 AM
Thanks for the explanation. Quick question: wouldn't this pwm splitter cable approach effectively produce the same results as the approach in my original post? Connect h110i to FAN 1 (master fan), front and back case fans to the PWM hub. Then connect the PWM hub to CPU_FAN on the motherboard.

I could be missing something, in which case please correct me and teach me the differences. I'm very new to this and just looking for the best solution.

Cheers!
Sorry, I can't find H110i manual online to check what the hookup is.
If H110i needs 3-pin variable voltage connection, use the CPU_OPT instead of the PWM fan hub.
If H110i needs 4-pin PWM connection use a PWM splitter.

Sorry for all the confusion.

phyrephox
09-12-2016, 04:17 PM
Sorry, I can't find H110i manual online to check what the hookup is.
If H110i needs 3-pin variable voltage connection, use the CPU_OPT instead of the PWM fan hub.
If H110i needs 4-pin PWM connection use a PWM splitter.

Sorry for all the confusion.

No problem at all, I really appreciate your time and advice. The H110i has a 3 pin connection. So just to confirm, I'll be taking these steps:

- Plug H110i 3-pin into CPU_OPT (no, +12v) on m/b
- Plug PWM hub 4-pin into CPU_FAN (yes, +12v) on m/b

This should allow me to see the RPMs and control the speeds of H110i and PWM hub individually using software. Is this all correct?

doyll
09-13-2016, 12:37 AM
No problem at all, I really appreciate your time and advice. The H110i has a 3 pin connection. So just to confirm, I'll be taking these steps:

- Plug H110i 3-pin into CPU_OPT (no, +12v) on m/b
- Plug PWM hub 4-pin into CPU_FAN (yes, +12v) on m/b

This should allow me to see the RPMs and control the speeds of H110i and PWM hub individually using software. Is this all correct?

That should work.
CPU_OPT header is

pin-1 = ground
pin-2 = 12v variable
pin-3 = rpm signal from fan
CPU_FAN header is

pin-1 = ground
pin-2 = 12v variable
pin-3 = rpm signal from fan
pin-4 = PWM control to fan

Please let us know how this all works out.

achat
12-10-2016, 11:40 AM
CPU_OPT 2nd pin 'Speed Control' is really the fan power using variable voltage. 4th pin 'VCC' basically means pin in not being used.

doyll
12-11-2016, 04:49 AM
CPU_OPT 2nd pin 'Speed Control' is really the fan power using variable voltage. 4th pin 'VCC' basically means pin in not being used.
Exactly! :D

Motherboard industry is notorious for using terms like 'Speed Control' on a power pin ... and 'VCC' (there is Vcc, but no VCC that I know of) .. or '5v' on pin-4 that when tested has on power at all. I seen many motherboards claiming to have PWM fan headers when they were really variable voltge and not PWM at all.
Moral of the story is be very careful about believing a motherboard fan header is PWM unless you have independent verification .. and don't believe it is PWM because someone plugged a PWM fan into it and it was speed controlled. I don't know of any PWM fans that will not work on variable voltage control. The only ways to verify if a fan header is PWM is to monitor voltage from pin-2 or use a fan splitter with PSU power connector supplying 12v to the fan and the motherboard only supplying the PWM and RPM.