Question Not enough fan slots on MB B450M PRO-M2 MAX

bundalomihailo

Prominent
Jan 17, 2019
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Hi im currently building my first pc and i purchased some stupid i case thats called Falcon Zeus Window RGB, FCR15ZBW.I cant find it anywhere on the internet and i cant undo the order.It has 3 front 120mm RGB fans and 1 120mm back RGB fan. I wanted to buy MSI B450M PRO-M2 MAX but i saw that it only has like 1 CPU cooler slot and nothing else.So what can i do since the case is alrady purchased and the MB is not. I was thinking maybe fan hub but since its my 1st build i need help and dont know the pins on the case fans since it will arive in like 1-2 days.
The case is from an official store in Serbia(its a well known store).
 

Barty1884

Titan
Moderator
This thing?
https://www.winwin.rs/kuciste-falcon-zeus-window-rgb-fcr15zbw-8658305.html

The Pro-M2-Max has a fan header for the CPU, and one system fan header:
  • 1 x 4-pin CPU fan connector
  • 1 x 4-pin system fan connector
https://www.msi.com/Motherboard/B450M-PRO-M2-MAX/Specification

Splitters exist, but you'd be looking at four fans from one header - which is a bad idea.
Typically a header is rated for 1A max, and fans typically are in the 0.25-0.3V range. In some instances, four is theoretically possible, but never a good idea. Absolute max I'd ever recommend is 3 fans on a single header - and preferrably two.

Some options:
1. Fan hub as you suggested. I'd expect those fans will be 3 pin, but any hub that'll accommodate 4 pin fans will also accept 3pin.
Example:
https://www.amazon.com/SilverStone-Technology-Silverstone-Splitter-SST-CPF04-USA/dp/B07N3HP8S5/ref=sr_1_3?dchild=1&keywords=fan+hub&qid=1596560396&sr=8-3

If you go this route - connect your rear & front fans to the hub. Keep the CPU fan connected to the motherboard directly.

2. Two splitters (one with two fans, the other with 3).
Example:
https://www.amazon.com/Splitter-TeamProfitcom-Computer-Extension-Converter/dp/B07TRV6XZX/ref=sr_1_5?dchild=1&keywords=fan+splitter&qid=1596560316&sr=8-5

With the splitters - connect your front 3 fans to one of them (system_fan header) and connect the rear alongside your CPU fan to the CPU_Fan header.
The front fans will be controlled as one - and the rear fan will ramp up/down in tune with the CPU fan.
 

bundalomihailo

Prominent
Jan 17, 2019
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So if i go with the hub way(which i propably will) i will connect all 3 or 4 pin connectors to the hub and thay will run at the same speed right?
What about the rgb cables on the fans?
 

Barty1884

Titan
Moderator
So if i go with the hub way(which i propably will) i will connect all 3 or 4 pin connectors to the hub and thay will run at the same speed right?
What about the rgb cables on the fans?
Everything other than the CPU fan.
And yes, I believe they will.... Some fan hubs can do quasi-independent control IIRC, but that'll depend on the hub you buy.

For the RGB, I'm not sure how they're configured. Typically 'cheap' included RGB fans wire up to a switch on the case & forgo motherboard support.
 
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bundalomihailo

Prominent
Jan 17, 2019
7
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510
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Everything other than the CPU fan.
And yes, I believe they will.... Some fan hubs can do quasi-independent control IIRC, but that'll depend on the hub you buy.

For the RGB, I'm not sure how they're configured. Typically 'cheap' included RGB fans wire up to a switch on the case & forgo motherboard support.
So my case just came and as i see its molex but i see some 3 pin male connectors that are connectes on 1st ans 2nd pins of molex.What should i do?
Also i have "RGB" button on my front panel with a connector marked "LED/RGB SW" what should i do then?
 

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