case fan connections ...

[alonshemesh1985]

so this is the deal, i have a z370 i7 motherboard, and a corsair 460x case, in my case i have 6 fans ... 4 case fans, and 2 fans that belong to the radiator .... the cpu radiator fans have their own power from motherboard connection, (1 of 4) that leaves 3 more connections and 4 fans .... at the moment the fan cables are routed over the board, and not behing it ,,,, i would like to know if its ok to get a PWM 4 splitter adapter, and give power to all 4 case fans (corsair sp120) from one cpu fan motherboard connection ... thanks .

 

[jay32267]

Usually you can. Check the current rating of the fans....and add them up....and you want that number to be less than the MB spec.

I've seen the spec is 1 amp in a lot of cases.

I've seen where you can put up to 7 fans on one header.

 

[alonshemesh1985]

have no idea what MB spec is ... these are my fans ... https://www.newegg.com/Product/Product.aspx?Item=N82E16835181118

 

[madmatt30]

You would likely get away with 4 from 1 connector.

Personally Id go a pair of twin splitters & use 2 board headers.

 

[jay32267]

Those fans shouldn't draw more than .4A . Most likely your header can supply one amp.

So...probably best to go with what Madmatt said.

 

[grimfox]

Madmatt has that best/cheapest/simplest answer. It's either that or get a fan controller with external power input.

 

[Paperdoc]

madmatt30 is correct, but there are a few more details to check. First, assuming that you have the Corsair SP120 RGB fans you linked to (there are many others similar), they draw at max 0.3 A per fan. So all four on one mobo header is NOT allowed. Two per header is. Next, these are 3-pin fans controlled only by Voltage Control Mode (aka DC Mode), and NOT by PWM Mode. Thus, you cannot use any common 4-pin fan HUB for them. Only simpler 4-pin or 3-pin fan SPLITTERS are suitable. The difference between those two device types is that a SPLITTER does NOT have an extra cable arm that must plug into a CPU power output connector. So, a couple of this type of thing is what you need.

https://www.newegg.com/Product/Product.aspx?Item=N82E16812423168&cm_re=coboc_fan_splitter-_-12-423-168-_-Product

THEN you will need to be sure that the mobo headers you use for this both can be configured to use the proper DC Mode, and NOT PWM Mode. If you need help on that point, post back with the maker and exact model number of your mobo.

 

[alonshemesh1985]

thank you very much for your responses. much appreciated

 

[Paperdoc]

You're welcome. Have fun!

 

[alonshemesh1985]

so basically i cut the cable fans, and connected 2 of them to one 4pin cable that runs to the board .... didnt have adapater ...

 

[Paperdoc]

If you have connected TWO of those fans to a single mobo header, that is quite OK. I hope you did this twice to connect a pair of fans to each of two headers, to accommodate all four fans. You can not connect all four to ONE mobo fan header - that would overload the header.

 

[alonshemesh1985]

If you have connected TWO of those fans to a single mobo header, that is quite OK. I hope you did this twice to connect a pair of fans to each of two headers, to accommodate all four fans. You can not connect all four to ONE mobo fan header - that would overload the header.

yeah only 2 fans are working on one header ...

 

[Paperdoc]

Great. Thanks for Best Solution.