Fan hub connection

[aaronjayvalenzuela]

I am a first time builder and will have the corsair 750D along with the MSI Z370 Krait motherboard and 7 Noctua fans.

5 fans being 140mm and 2 being 120mm. I an aware that there is something called a fan hub that allows you to hook up a lot of fans but here's the thing that bothers me.

1) People say to not plug the fan hub into your motherboard (i don't even know where you would plug it in) because it is to much voltage or something along this matter.

2) People are saying that it's better to plug a fan hub into your PSU (which makes sense) But how would i do this? because i imagine there being SOO MANY cords from 7 different fans and i feel like i would be overwhelmed.

I've tried looking all around the interweb but have not found any videos explaining how to connect a fan hub into your pc.

Ifeel confident about connecting everything else it's just these damn fans and i feel like if i make one wrong move then my whole system will fry and explode in my face like a cartoon scene from tom and jerry. Much help would be appreciated, and thank you all!

Also, what is a fan splitter and i am aware that all of the noctua fans i have are PWM and i was just wondering if a fan splitter was like a fan hub or something that you could plug into your psu or something if its advised.

Thank you!

 

[CountMike]

With so many fans you are practically obliged to use a fan hub with connection to power supply. They connect thru Molex or SATA power connectors to PSU.

 

[aaronjayvalenzuela]

With so many fans you are practically obliged to use a fan hub with connection to power supply. They connect thru Molex or SATA power connectors to PSU.

So if my analysis is correct, then i will plug the actual fan hub into the PSU -
(SilverStone PWM Fan Hub System Cables, Black (CPF04)

And each fan will have a Serial ATA connector on them which will hook up to a molex connector from the fan hub. And i will plug the sata cables into the molex connectors which if there are 7 fans then there will be 7 molex connectors and sata cables and the sata cables will go into the fan hub in which the fan hub is connected through the PSU...

sorry for being difficult, im just really trying to have a good graspe or understanding in this as its the only thing that is foggy in my mind. Thank you mike!

 

[CountMike]

Not exactly. Hub gets power form Molex Or SATA power connector but fans connect to hub in normal way, 3 or 4 pin connectors. Hub also connects to one of the headers on MB to provide RPM data to BIOS and to enable BIOS to control their rpm either by varying voltage (3pin) or PWM (4pin). Either way they would behave as one.

 

[aaronjayvalenzuela]

Not exactly. Hub gets power form Molex Or SATA power connector but fans connect to hub in normal way, 3 or 4 pin connectors. Hub also connects to one of the headers on MB to provide RPM data to BIOS and to enable BIOS to control their rpm either by varying voltage (3pin) or PWM (4pin). Either way they would behave as one.

So the fan hub has a SATA cord that will connect into one of my PSU's SATA ports and that will allow me to hook up all of my 7 PWM fans into each 4 pin connector on the fan hub? and i hear that connecting a fan hub to your motherboard isn't a good idea....has to do soething with like voltage idk...

 

[CountMike]

SATA cord provides only 12v power to hub which distributes it to fans, that's so fans wouldn't draw power from MB and potentially overload it. The other cable connects such hub to a fan header on MB and doesn't use any power from it, only provides BIOS with fan rpms and allows it to control fan speed. So it's quite safe.
Hubs without power input are only splitters and use all power from MB fan header, same as you would physically connect all fans to one header. Each MB fan header can take only a couple of 120 -140mm fans.
P.S. CPU cooler fans and eventual pump should not be connected to hubs, only in their appropriate places like CPU_Fan for instance.

 

[aaronjayvalenzuela]

SATA cord provides only 12v power to hub which distributes it to fans, that's so fans wouldn't draw power from MB and potentially overload it. The other cable connects such hub to a fan header on MB and doesn't use any power from it, only provides BIOS with fan rpms and allows it to control fan speed. So it's quite safe.
Hubs without power input are only splitters and use all power from MB fan header, same as you would physically connect all fans to one header. Each MB fan header can take only a couple of 120 -140mm fans.
P.S. CPU cooler fans and eventual pump should not be connected to hubs, only in their appropriate places like CPU_Fan for instance.

Ah,so i believe i understand now, so the fan hub will have a cord that will connect to one of my motherboard 4 pin fan headers and it will also have a Serial ATA cable ot molex connecting to my PSU which will power all the fans.

 

[CountMike]

Exactly, power from PSU directly and control from MB. That way all fans are still controllable and their rpm read by BIOS and programs without overloading output from MB.

 

[aaronjayvalenzuela]

Exactly, power from PSU directly and control from MB. That way all fans are still controllable and their rpm read by BIOS and programs without overloading output from MB.

So then this means that my other system fan headers on my motherboard become obsolete or a nuance i guess.

 

[CountMike]

No, just not needed, except for CPU cooler fan(s) and eventually a pump if you have liquid cooler. Those should not be used thru hub.

 

[aaronjayvalenzuela]

No, just not needed, except for CPU cooler fan(s) and eventually a pump if you have liquid cooler. Those should not be used thru hub.

Okay so count mike, i have made changes, i will be using the Asus ROG STRIX Z370-F gaming motherboard. I believe from observation that this motherboard only has 2 fan connectors on the motherboard itself. And also, i will be only using 4 fans.
2x Noctua 140mm
2X Noctua 120mm

I will obviously need to use a fan hub or fan splitter. Will it be safe for using two fan splitters to power 4 fans on the motherboard or should i just use a fan hub?

 

[CountMike]

Yes, you can pair two same size fans to one header on MB using just a Y splitter.

 

[aaronjayvalenzuela]

Yes, you can pair two same size fans to one header on MB using just a Y splitter.

And the power draw will be safe?

 

[CountMike]

Xes. 2 on each is not a problem