AIO Cooler question

[NonanonymousCarl]

So new Threadripper system is complete minus waiting on an RMA'ed video card, cable management and one other small issue. I bought a Fractal design Celsius s36 and the last step in the manual is to connect it, fine, save my mother board an MSI Pro Carbon x399 has a cpu fan header and a water pump fan header and the instructions just say to connect it . What header should I choose cpu fan header or Water pump fan header or does it matter? Also is it fine to run multiple case fans from one motherboard fan header, I am pretty sure I remember I can with a splitter, but it's been since 2011 since I build a fresh build, as the other system was a 8 core xeon that just needed minor updates time to time.

[Katsunaka]

Connect it to your water pump header. So your mobo can control thr speed of the water pump based on temps.

 

As for the fans, idk.

[Hiitchy]

Just connect your water pump to the water pump header. If you have a fan hub (Which it looks like you do according to Fractal Design's website) then connect all the fans into the header on the radiator, and run the connection from the radiator into the CPU fan header.

[pyrojoe34]

6 minutes ago, Katsunaka said:

Connect it to your water pump header. So your mobo can control thr speed of the water pump based on temps.

 

As for the fans, idk.

Most AIOs pumps are not controlled by the fan header (not sure about the s36 though) so that wouldn't matter. They're usually controlled by a USB connection, you want the header to give 100% power all the time, not be modulated. I connect my AIO to the CPU header to avoid "no CPU fan" errors (which you can just disable in the BIOS if you prefer), and so the built in system shutdown can be sensed if the mobo senses the AIO has failed.

[pyrojoe34]

5 minutes ago, Hiitchy said:

Just connect your water pump to the water pump header. If you have a fan hub (Which it looks like you do according to Fractal Design's website) then connect all the fans into the header on the radiator, and run the connection from the radiator into the CPU fan header.

Except with water cooling you don't want the fans controlled by the CPU temp (which is what the CPU header would do) you want it controlled by the water temp. Otherwise you're ramping up when it doesn't need to (if the water isn't hot then there's no reason to increase the speed), and the fans slow down when CPU temp drops even if the water is still hot after an expended load.

[Guest]

I'd go w/ the CPU fan header for the same reasons @pyrojoe34 mentioned.

[Hiitchy]

Just now, pyrojoe34 said:

Except with water cooling you don't want the fans controlled by the CPU temp (which is what the CPU header would do) you want it controlled by the water temp. Otherwise you're ramping up when it doesn't need to (if the water isn't hot then there's no reason to increase the speed), and the fans slow down when CPU temp drops even if the water is still hot after an expended load.

Then the question would be how does the integrated hub on the radiator work? It says there's a concealed cable so they're not very clear in whether it's being controlled VIA the pump or if there's a separate cable.

[NonanonymousCarl]

If it helps here is the manual if I missed something. http://www.fractal-design.com/media/aafd0e79-4bd3-4510-8961-90d1c56fd25c

[pyrojoe34]

6 minutes ago, Hiitchy said:

Then the question would be how does the integrated hub on the radiator work? It says there's a concealed cable so they're not very clear in whether it's being controlled VIA the pump or if there's a separate cable.

Not sure about that specific AIO. I assume the built-in hub controls the fans based on the water temperature when set to "intelligent mode". If there isn't some sort of USB connector on the AIO for user control, then maybe the PWM mode is controlled by the CPU temp but that seems like poor design since like I said, water cooler curves should not be based on CPU temp but should be based on water temp.

 

My AIOs have a USB connection and I control the fans and pump via the software.

[NonanonymousCarl]

There is an "auto" and a "PWM" setting for the cooler so I assume then by the above I t should be on the CPU header or the Water Cooler header for PWM? I don't think I want to try "auto" with such a hot chip and one that I will be rendering 3d on for hours.

 

[Hiitchy]

Just now, NonanonymousCarl said:

There is an "auto" and a "PWM" setting for the cooler so I assume then by the above I t should be on the CPU header or the Water Cooler header for PWM? I don't think I want to try "auto" with such a hot chip and one that I will be rendering 3d on for hours.

 

So I actually watched a video from JayzTwoCents and I think in this case it would benefit you if you watched it to understand what everything does and why he runs the fans into the header and how the Auto / PWM function works.

 

Mods: Sorry in advance if I'm not allowed to link this video.... Seems Linus didn't actually review it.

 

[Brett_Bst]

simple....run pump off any source that will run it @ 100% all the time period..... fans can be run from cpu header but you will have to adjust the fans curve so there not going crazy when the cpu temp goes up, the fans can be set to around 40% 95% of the time then up the curve at the end when temps go above 70c or so, mine is running 40% and cant hear them they hardly ever ramp up coz there super lound when they do my idle temps are 28c and never above 75c no matter what I'm doing, with the h115i the connection to the pump header is a single wire on a 4 pin connection and is ONLY used as a moniter for pump speed, not sure what the Celsius has

[NonanonymousCarl]

Well the Fractal got back to me, leaving this here if someone else has this identical problem.

 

Thank you for contacting us here at Fractal Design. We recommend that the power cable be connected to the CPU fan header.

 

Best Regards,
Fractal Design Support