Splitting fan power

[TheV_Machine]

Hi there,

my new mobo has one cpu fan connector and one case fan connector. I got another case fan no just hanging around in the case and connected it to the fdd psu connector until i find a solution. my current idea is to connect the power cable and the ground of the second case fan to the same connectors of the alreadfy attached cpu fan. I could also do this with the case fan connector, but the second case fan and the case fan connector have a bigger gap between then whrer the cpu fan connector and the second case fan cable are right next to each other. My question is, because connecting the second case fan to a random fan connector would put two fans in a parallel curcuit to each other and that would mean that the ampere power would overall decrease. Would that affect the maximum spin speed of the fans or would the bios recognize the unfullfilled potential and direct more power to the fan connector and by this be able to run both fans from one connector at maximum speed?

Thx for helping

[Cyracus]

the fans will run fine off a splitter, their max speed won't be hindered, but it's only capable of monitoring one fan, and both fans will run on the same fan profile

[paddy-stone]

Just buy a fan splitter cable, they are very cheap. IIRC you can have around 6 before Amps becomes a problem.

[TheV_Machine]

3 minutes ago, Cyracus said:

the fans will run fine off a splitter, their max speed won't be hindered, but it's only capable of monitoring one fan, and both fans will run on the same fan profile

of coure, but that isnt really a problem because the mentioned case fan is orientated in a way that it pulls air into the case directly into the direction of the cpu fan pulling this air through the tower cooler, it would kinda be more of a benefit

3 minutes ago, paddy-stone said:

Just buy a fan splitter cable, they are very cheap. IIRC you can have around 6 before Amps becomes a problem.

why should you buy something you can buy yourself? gonna connect some spare cables to the connector of my cpu fan with the two cables of my second case fan and just saved a few bucks, but thanks for the info about 6 at a time being the point of decreasing ampere values

[paddy-stone]

1 minute ago, TheV_Machine said:

of coure, but that isnt really a problem because the mentioned case fan is orientated in a way that it pulls air into the case directly into the direction of the cpu fan pulling this air through the tower cooler, it would kinda be more of a benefit

why should you buy something you can buy yourself? gonna connect some spare cables to the connector of my cpu fan with the two cables of my second case fan and just saved a few bucks, but thanks for the info about 6 at a time being the point of decreasing ampere values

No worries, I'm not sure if it's 6, could be more. Yeah if you want to build it yourself go ahead, as long as you know what you're doing and know the risks (if any) to doing things that way. I don't think it's much of a risk, but on the other hand I would rather pay $1 for a fan splitter cable... in fact I have quite a few spare as I usually egt them included when I get fans from Noctua and such, they are very handy.

 

Anyway, good luck with it, be sure to post back and show your results.

[LogicalDrm]

Not any electric wizard,but if you connect two fans to one header, it will be sum of their amperage. Each mobo header can provide 1A, fan are somewhere like 0.2-0.45A per. As long as you don't go over that 1A limit, mobo will give all connected fans max 12V. Unless you limit it with inline resistor or from mobo control options.

[AshleyAshes]

17 minutes ago, LoGiCalDrm said:

Not any electric wizard,but if you connect two fans to one header, it will be sum of their amperage. Each mobo header can provide 1A, fan are somewhere like 0.2-0.45A per. As long as you don't go over that 1A limit, mobo will give all connected fans max 12V. Unless you limit it with inline resistor or from mobo control options.

If a 120mm fan from Noctua is typical, more like .09 amps (NF-P12).  The scenario in 99% of situations would be 'You will run out of places to put fans before you could put too much drain on a single fan header.'

[LogicalDrm]

8 minutes ago, AshleyAshes said:

If a 120mm fan from Noctua is typical, more like .09 amps (NF-P12).  The scenario in 99% of situations would be 'You will run out of places to put fans before you could put too much drain on a single fan header.'

I think I use Coolermaster, Corsair and iPPC as reference. I'm not sure anymore. typical Corsair is 0.25/7A

[TheV_Machine]

2 hours ago, AshleyAshes said:

If a 120mm fan from Noctua is typical, more like .09 amps (NF-P12).  The scenario in 99% of situations would be 'You will run out of places to put fans before you could put too much drain on a single fan header.'

challenge accepted

3 hours ago, paddy-stone said:

No worries, I'm not sure if it's 6, could be more. Yeah if you want to build it yourself go ahead, as long as you know what you're doing and know the risks (if any) to doing things that way. I don't think it's much of a risk, but on the other hand I would rather pay $1 for a fan splitter cable... in fact I have quite a few spare as I usually egt them included when I get fans from Noctua and such, they are very handy.

 

Anyway, good luck with it, be sure to post back and show your results.

im planing on doin a post about my updated build, you will see the results