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Fan connector splitter compatibility issues

Last response: in Systems
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July 18, 2013 3:28:00 PM

Hello

I will start by stating which fans will be in my case and what roll they will play:

INTAKE_FRONT:
BitFenix 200mm Spectre PRO Fan × 2

INTAKE_HDD_PASSTHROUGH:
BitFenix 120mm Spectre PRO Fan × 2

EXHAUST_TOP:
BitFenix 200mm Spectre PRO Fan × 2

EXHAUST_REAR:
BitFenix 140mm Spectre PRO Fan

I hope to install each class of these fans to their own header on the motherboard, but I only have 4 headers; (and 7 fans!). So I'm choosing to use a splitter.

The splitter I intend to use is this.

Now this particular splitter is 3-pin female (that corresponds to the male connectors on my motherboard) to 2× 3-pin male connectors (that I hope will be compatible with each of my fans).

I also notice that it is a splitter 'Y' cable. What does this mean?

Will the splitter cable work with the fans I have selected?

Thank you for your time.
a c 330 V Motherboard
July 18, 2013 8:31:55 PM

Y simply refers to the shape of the cable. One MB connector to two fan connectors. But you should really check the current rating of the fan headers on your MB first. Most are limited to 1 amp or less. Then check the current draw of the fans you intend to connect in parallel. Add together the fan current ratings that will connect to the same header.

And be aware that any RPM displays in BIOS or Windows will be screwed up with 2 fans in parallel. You may want to consider a fan controller or just connect them directly to a Molex connector from the PSU.
July 19, 2013 3:27:56 AM

clutchc said:
Y simply refers to the shape of the cable. One MB connector to two fan connectors. But you should really check the current rating of the fan headers on your MB first. Most are limited to 1 amp or less. Then check the current draw of the fans you intend to connect in parallel. Add together the fan current ratings that will connect to the same header.

And be aware that any RPM displays in BIOS or Windows will be screwed up with 2 fans in parallel. You may want to consider a fan controller or just connect them directly to a Molex connector from the PSU.


Okay I looked up the current rating for each fan and it turns out that each channel I intend to hook multiple fans up to will be below a current of 0.6A.

Now how or where would I discover the current rating for the 3-pin connectors on my motherboard?

I have an ASUS P8Z77-V PRO motherboard.

PS: The fan splitter actually states: "2 Male to 1 Female", will it work vice versa like in my case?
PPS: If the two fans hooked up to each header are the same fan type, will the RPM read-out be screwed up?

Thanks

Best solution

a c 330 V Motherboard
July 19, 2013 10:04:22 AM
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While page 2-23 of your MB manual states that the CPU fan header is limited to 1A (12W), it says nothing about the other fan headers. But, for safety sake, I would assume they to are limited to 1A (12W). Other boards I've had that were a bit more descriptive about their on-board headers always gave a 1A limit. I think I had a board once that exceeded that by 0.1A once.

2 male to 1 female is what I was referring to. The 2 male will plug into the fans and the female will plug into the board.
Since the tach feedback is a signal that will be multiplied by 2, I imaging even like-speed fans will confuse the BIOS.
!