Phanteks PWM hub setup

Oriaz · 27 Nov 2016 at 17:06

Hey guys,

Pretty sure I am doing something wrong, so wanted to check it out here!

I just finished building a new hard-tube watercooled setup with 2 radiators (top and front) in a Phanteks Enthoo Primo case. The case comes with PWM hub hidden around the back in the cable management area, and some pretty terrible instructions!

I have connected a 4-pin cable from the CPU Header on the motherboard (MSI X99 SLI Krait Edition) to the indicated connector on the PWM hub. I have also connected the 12v power supply. I have then connected a 3-way splitter to the 3x Vardar fans on the top radiator to another of the PWM hub connectors, and there were 3 case-fans already connected to hub when I got the case (2 of them are at the front, and I am using them to cool the font radiator).

This is how it looks:

My problem is that the system doesn't seem to detect any CPU fan, just "system" fans as you can see here:

And when the temps are low, rather than reducing the speed of all 3 fans on the top radiator, it just seems to randomly stop one of them, so that 2 of the 3 fans are spinning, and one is idle.

I'm trying to figure out how to connect everything so that I can set a temperature profile that actually works properly! Or is it better to ignore the hub, and just connect everything individually to the motherboard headers?

Thanks for any help, hopefully it made some sense

Cheers, Ori

Oriaz · 27 Nov 2016 at 17:32

I did try that originally, but then there was a cryptic sentence in the user-guide that said "Y-splitter should not be connected to FAN 1", which I assume also applies to my 3-way splitter, so I put it somewhere else.

Maybe I'll try again and see.

Thanks for the reply,
Cheers

Oriaz · 27 Nov 2016 at 17:34

Ahh, I can try to connect the fans individually, problem is that only one of them has a cable long enough to reach, so it's purely through convenience that I was using the splitter

. Think I have 1 x extension from an old Noctua fan somewhere though that I can use

Oriaz · 28 Nov 2016 at 19:16

Thanks for the advice guys,

So I've just plugged one of the fans into the white connector, and managed to plug the other 2 into two separate connectors on the hub, using extensions. So, all 3 fans are connected to different connectors now. The problem is that all 3 fans have 4-pin connectors, and all of the points on the PWM Hub (including the white one) are 3-pin.

So far, it seems to have worked I think. Speedfan now recognises a CPU fan, Fan 4 and Aux1 Fan. But I do still seem to have the issue where it shuts down fans, rather than slows them all down. When I first turned the PC on, my CPU was at 35 degrees, and only 1 of the 3 fans was spinning. I booted WoW and it went over 50 degrees, and then all 3 started spinning!

Now I just need to figure out the best way to control them I guess. I can do it via the BIOS, but not sure if something like speedfan is better.

Thanks again for the help, I'll keep fiddling to get this right before I start working on the overclock

Cheers