Phanteks primo pwm hub

Falconik · 3 Sep 2015 at 13:31

Hi I've recently purchased the phanteks primo case and I'm trying to get the pwn hub working. My scenario is this. I have a water cooling loop so I don't have any direct pump or heat sink that I have to plug into my mother board. I use the 4 pin pwm cable and plug it into my cpu fan header, I then use just one of my noctua fans which I have on my radiator for my master fan in slot 1, I then plug the rest of the fans into the hub. The sata power cAble is also plugged in as I have 8+ fans.

Now my problem is, when I boot up I get cpu fan error. Is this because it is not reading a fan speed and I need to set my cpu fan speed to ignore?? If I do this will it still read the temperatures so my pwm hub will still work correctly?

I have got it working but not the way the manual says so I don't actually know wether it working properly. I have my 4pin pwm cable plugged into a chassis 4 pin slot and just one of my case fans in the cpu fan header. Everything boots and all fans are turned on but I don't know wether it will be reading temps and working as it should. My motherboard is rampage v extreme.

Thanks in advance.

savagesam117 · 3 Sep 2015 at 14:03

It will be reading your temps as they come from the components not from the fans. are you sure it's your main CPU fan header? I had this on my board until i realised it was in the CPU fan 1 not main. But you could always turn it off, which would then in turn obviously stop the fan control.

Falconik · 3 Sep 2015 at 14:12

Ah right, I had it plugged into the one that's next to cpu opt? Is that the main one? Would it all still work as it should if I just turned it to ignore?

Falconik · 3 Sep 2015 at 14:29

Also if it reads the temps threw the components then what's the point in plugging the pwm cable in this first place? Or is that just there to power the rest of the fans

doyll · 3 Sep 2015 at 23:34

Fan headers control fan speed based on component temperatures. The hotter a component is the higher fan speed.

The Phanteks PWM fan hub is not a PWM hub.
It is a 3-pin variable voltage fan hub controlled with a PWM signal
The PWM signal adjusts the voltage to the fans which controls the fan speed.

The 4th pin on all 4-pin headers is not PWM signal
But PWM requires a 4-pin header
On most motherboards the only 4-pin header that is a PWM fan header is the CPU fan header.
These 4-pin CPU fan headers often have a setting in bios to set them to PWM or variable voltage.

3-pin headers are

pin-1 = grd
pin-2 = variable voltage
pin-3 = rpm signal

4-pin PWM headers are

pin-1= grd
pin-2 = 12 volt
pin-3 = rpm signal
pin-4 = PWM signal

Other 4-pin headers do not have PWM on pin-4.

Falconik · 4 Sep 2015 at 08:40

Hi doyll, so I've put my 4 pin cable into the cpu 4 pin header. And the rest of my fans into the hub. With one of my case fans been the master fan. But for my PC to boot I had to set cpu monitor to ignore ? Will it all still work as it should? Or should I put it in one of the 4 pin chassis headers, will it still work then? Also another question. I have 4x fans on my rad, are they ok been on my hub or should I have connected them separately. I have 2 notcua pushing and the xspc fans pulling

Tealc · 4 Sep 2015 at 12:46

Does your BIOS return a tach value for the fan you have connected as master fan? It should.

You may be experiencing a warning because your main fan is reporting a lower than expected rpm value. You may find that the BIOS has a lower threshold for fan warning, say 1000rpm, where if it finds the fan tach to be below this level it'll throw a warning or carry out some other task.

Or your Phanteks device may not be working properly and not returning tach, or your fans may be running so slowly that your motherboard is ignoring the tach signal as it is too low in voltage.

doyll · 4 Sep 2015 at 12:54

Little hard to understand what you are saying Falcon, but I'll try.
4-pin cable is the Phanteks double plug ended cable plugged into hub and CPU fan header?
Rest of fans is what? 4x radiator fans, and how many case fans?
It really doesn't matter which fan is master, but the faster it spins the better your chances of being able to use the low fan speed waring .. not that is is needed.
CPU monitor is what? CPU temperature or CPU fan low speed monitor? The low speed monitor is not needed.
You you "it" so many times I have no idea what it means in each application.

4x fans on radiator are fine on the hub .. as are the case fans.

Hope that all makes more sense to you than yours does to me.

Falconik · 4 Sep 2015 at 14:52

Ok guys so here's what happens. When my PC boots the fans don't start until after post. Then I get the cpu fan error warning. When I set cpu fan monitor to ignore in bios, the error stops showing and my computer starts fine. But my worry is that..... Does the monitor need to be enabled for the hub to work properly. I have now configured my case so that my 4 noctua fp12 fans ionmy rad are separated and connected to a fan controller as I want more control over that because it's purely for my cpu obviously. I have 5 case fans hooked up to my pwm hub, with the 4 pin cable that has the sticker on it saying (To motherboard cpu fan header). So this is what I have done. But like I said my only worry is that the hub might not be working as it should due to cpu fan monitor been set to ignore? Should this effect anything or not? Thanks hope this makes sense .