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Fan Splitters/Hubs/Controllers

Alkali A
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Go to solution Solved by WoodenMarker,
3 minutes ago, Alkali A said:

so would the first link I posted be the right choice then?

So I can run all the fans off the one header?

And would I be able to just have the 3-pin fans on the same splitter as slave fans?

Yes, that splitter would work. The header only provides the signal. The power is coming from the additional power connector.

The pwm signal uses 12v which would run any 3pin fans connected at 100%.

Posted

So I have a Gigabyte HD3P mobo with 2 PWM fan headers, 3 including the cpu fan, and one 3-pin fan header.

 

I have one 120mm cpu fan, two 120mm 3-pin fans, two 140mm PWM Noctua fans, and two 120mm PWM noctua fans.

 

cus I don't have enough headers on my mobo I'm using two fan splitters to connect more than one to a header, the problem being that the splitters also splits the voltage from the mobo between the fans.

 

which would be fine more or less, as the end intended result is silent fans, but the voltage the fans receive is enough to run the fans, but not start them.

 

So I have to go into the bios, set the fans for full speed, restart, go into bios again, and then set the fans back at the speed I want them to run at after they've gotten enough momentum to keep them running.

 

needless to say this is pretty tedious and time consuming.

 

 

My question is what fan splitter/hub/controller should I get to keep all the fans powered like they should be while still having them run off the bios setting

 

(and for that matter, what is the the definitive difference between the 3)

 

also, would this work? https://www.amazon.com/gp/product/B00IF6R4C8/ref=ox_sc_act_title_2?ie=UTF8&psc=1&smid=A3GO5VFCNOM5I7

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Posted

Splitter and hub do the same thing, but a splitter generally outputs to 2-3 fans, while a hub can output to a lot more.

 

A controller is able to act as a splitter/hub, but also control the fans by itself using dedicated physical or software controls. 

 

The one that you linked is a hub, however it can also control fan speed. It will control using the setting of whichever fan header you plug it into on the motherboard. Yes, it will work.

"Rawr XD"

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Splitters shouldn't split the voltage. 

Which fans are having this issue and what header are they plugged into?

What splitter are you using?

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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6 minutes ago, WoodenMarker said:

Splitters shouldn't split the voltage. 

Which fans are having this issue and what header are they plugged into?

What splitter are you using?

all fans are getting less than normal voltage, except the cpu fan which isn't on a splitter.

 

And using one of each of these

 

https://www.amazon.com/gp/product/B01GZPEQW6/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1

 

https://www.amazon.com/gp/product/B004CLFOK4/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1

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3 minutes ago, Alkali A said:

all fans are getting less than normal voltage, except the cpu fan which isn't on a splitter.

And using one of each of these

https://www.amazon.com/gp/product/B01GZPEQW6/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1

https://www.amazon.com/gp/product/B004CLFOK4/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1

Missing a few answers here..

Which fans are having this issue and what header are they plugged into?

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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1 minute ago, WoodenMarker said:

Missing a few answers here..

Which fans are having this issue and what header are they plugged into?

ALL fans but the cpu fan are having the problem and they're both plugged into the two PWM headers

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2 minutes ago, Alkali A said:

ALL fans but the cpu fan are having the problem and they're both plugged into the two PWM headers

Only the cpu_fan header supports pwm. Split off of that header for your pwm fans.

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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2 minutes ago, WoodenMarker said:

Only the cpu_fan header supports pwm. Split off of that header for your pwm fans.

wouldn't the point of a 4 pin header be pwm?

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Just now, Alkali A said:

wouldn't the point of a 4 pin header be pwm?

4pin fan headers may be differently depending on the motherboard.

The 4th pin can serve for different things aside from pwm like a 'low noise' 5v, voltage control, or a dummy. 

 

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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2 minutes ago, WoodenMarker said:

4pin fan headers may be differently depending on the motherboard.

The 4th pin can serve for different things aside from pwm like a 'low noise' 5v, voltage control, or a dummy. 

 

I just need the fans to all get enough voltage to start up on their own without me having them run at full speed first, and stay at a low voltage/low noise level so I can't really ehar them.

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Just now, Alkali A said:

I just need the fans to all get enough voltage to start up on their own without me having them run at full speed first, and stay at a low voltage/low noise level so I can't really ehar them.

Well if you want to run your pwm fans as intended with pwm, use your cpu_fan header.

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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1 minute ago, WoodenMarker said:

Well if you want to run your pwm fans as intended with pwm, use your cpu_fan header.

so would the first link I posted be the right choice then?

 

So I can run all the fans off the one header?

 

And would I be able to just have the 3-pin fans on the same splitter as slave fans?

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3 minutes ago, Alkali A said:

so would the first link I posted be the right choice then?

So I can run all the fans off the one header?

And would I be able to just have the 3-pin fans on the same splitter as slave fans?

Yes, that splitter would work. The header only provides the signal. The power is coming from the additional power connector.

The pwm signal uses 12v which would run any 3pin fans connected at 100%.

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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1 minute ago, WoodenMarker said:

Yes, that splitter would work. The header only provides the signal. The power is coming from the additional power connector.

The pwm signal uses 12v which would run any 3pin fans connected at 100%.

So if I connected the 3-pin fans to the same splitter as the PWM fans that connects to the cpu header they would just be at 100% all the time?

 

If I just connect the 3-pin fans to my remaining headers could I just run them under-volted?

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4 minutes ago, Alkali A said:

So if I connected the 3-pin fans to the same splitter as the PWM fans that connects to the cpu header they would just be at 100% all the time?

If I just connect the 3-pin fans to my remaining headers could I just run them under-volted?

If you want to control your 3pin fans, connect them to sys_fan1/2. Sys_fan3 is just a powered header.

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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Just now, WoodenMarker said:

If you want to control your 3pin fans, connect them to sys_fan1/2. Sys_fan3 is just a powered header.

So PWM fans and CPU fan through that Linked splitter to the CPU header, and then the 3-pin fans to sys_fan1/2 header/s?

 

what would happen if I ran the 3-pins through one of the already-owned splitters before connecting to the sys_fan1 or 2?

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11 minutes ago, Alkali A said:

what would happen if I ran the 3-pins through one of the already-owned splitters before connecting to the sys_fan1 or 2?

The splitter splits the signal. If you're just using one fan, nothing changes. 

11 minutes ago, Alkali A said:

So PWM fans and CPU fan through that Linked splitter to the CPU header, and then the 3-pin fans to sys_fan1/2 header/s?

Yes if the cpu fan is pwm.

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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2 minutes ago, WoodenMarker said:

The splitter splits the signal. If you're just using one fan, nothing changes. 

Yes if the cpu fan is pwm.

okay thx, I think that clears up my questions all around.

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