Fan Splitters Concern(s)

[NickB]

If I use a fan splitter cable on my motherboard, will the motherboard know that I'm using it? Or will it confuse it for 1 fan and so each fan has to share the volts which would slow them down?

[Lord_Karango17]

the motherboard will see it as just one fan, so both will be running at the same speed.  they should be running at the same speed as one fan, but they will draw more power, so you need to be careful if they are high power draw fans.

 

Its better suited for things like front case fans, that all should be running at the same speed.

[LogicalDrm]

Mobo will see single fan. With splitters you generally have to guess or test which head is the primary one. With hubs its marked. But usually you use splitters to two identical fans so it doesn't matter which is the one to be monitored and/or controlled.

[nims0c]

Or will it confuse it for 1 fan and so each fan has to share the volts which would slow them down?

 

Adding more fans in parallel doesn't change the voltage drop across them.

[tomas710]

If I use a fan splitter cable on my motherboard, will the motherboard know that I'm using it? Or will it confuse it for 1 fan and so each fan has to share the volts which would slow them down?

For example, i have 2 AP121s that run at max 1500 RPM. Almost all of the time, the fan control software runs them at the RPM i want, but ocasionally, for like a second, i see fan speed 3000 RPM, so ocasionally and briefly my mobo adds the RPMs of both fans, but in practice it works great, and i'm using a 1 dollar 3 pin splitter, and another for the top fans, and a PWM for the other rad fans, and they all work great.