3 things drawing power from a single fan header on EVGA clc 280?

[thtran6]

So here's my specs:
msi z370 A-pro mobo
i7-8700k
32gb ddr4 ram
gtx 1080

So I just updated my h60 to an EVGA clc 280 (stock fans replaced with 2 noctua nf a14 ippc3000 fans).
There are 3 cables that branch out from the clc 280.
1st: a mini usb cable that connects to a usb port on the mobo to control evga software
2nd: a cable to connect to the pump header on the mobo
3rd: a cable that splits (like a Y) into 2 fan headers, which will connect to the 2 noctua radiator fans.

I currently do NOT use the 3rd cable because I connect the 2 radiator fans directly to the mobo's two CPU_FAN headers. This will let me control their rpm in the BIOS, but not in the EVGA software.

Question: so if I connect the 2 radiator fans to the 3rd cable described above (to control them in the EVGA software), does that mean all of the voltage/power for the pump and the 2 radiator fans will be drawn from that one single pump header? that's a total of 3 things drawing power from a single header right?

Would this be dangerous for the header? And would it even supply enough voltage/power to spin all 3 of these at max rpm?

Thank you for your inputs.

 

[Lutfij]

Yes you should connect the fans to that Y cable

Are the fans you have, from Noctua, higher in power draw? You have nothing to worry about.

 

[thtran6]

No, I believe the noctua's are just drawing 12V max just like the stock fans.

Because the single pump header would be the only thing supplying power to the pump and the 2 fans. I was just worried that the header would suffer too much voltage when I crank all 3 things to their max rpm.

 

[rubix_1011]

It isn't dangerous, but you might be able to find the max draw load in schematics somewhere. Some MB vendors are better than others at providing these types of details.

I think you could also find a PWM splitter that allows power draw from MOLEX or SATA power while still honoring the header speed signal...I would have to dig around and see if this is even a thing.