Why does one split have a pin missing? With the missing pin, can it still power a 3 pin fan?

The missing pin is what the motherboard uses to read the fan's speed. As it can only read one, only one header has that pin. The 4th pin is PWM. The remaining two are power and ground, which is what a 3 (or 4) pin fan runs on, so yes, it will power a 3 pin fan.

I’m sorry i wanted to know the fan splitter one has 4 pins and the other 3? Is that normal or it’s missing the pins?

That's how it's supposed to be. The 4-pin header includes a "TAC" (tachometer) signal that goes from the fan to the motherboard so it can report the fan RPM. The motherboard can only read one fan or the other, so plug the fan you want to read into the header with 4 pins. The fan on the connector with only 3 pins will still get power, ground, and the PWM control signal from the motherboard, but you won't be able to measure its RPM.

will this work for 2 fans that both have 4 pin connector?

Yes. One cable is 3 pin (slave) so the speed sensor works off the 4 pin side.

Can 3-pin fans be used with this adapter? i'm using two corsair rled fans and two that came with the 100r case.

This will allow you to use both fans, but beware, it will not allow you to adjust the fan curves at all. I used several programs including the MOBO's own settings to try and change it.

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All Black Sleeved PWM Fan Splitter Cable 1 to 2 Converter, 2 Pack

Product ID: 263644168

Details

Brand
JBtek
Cable type
AUX
Compatible devices
Cellular
Connector type
Auxiliary
Special features
Tangle Free

🔌1-to-2 PWM fan splitter

⚙️Signal conflict prevention pin removed

🖥️Supports simultaneous dual fan control

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Description

⚡ Double your cooling, halve your hassle!

CONFLICT FREE DESIGN - Unique pin removal prevents fan speed signal interference
DUAL FAN POWER BOOST - Split one PWM socket into two for enhanced cooling control
COMPACT LIGHTWEIGHT - Easy to install and carry without adding bulk or weight
PLUG PLAY SIMPLICITY - No drivers needed—just connect and optimize your airflow instantly
SLEEK ALL BLACK AESTHETIC - Professional matte finish blends seamlessly with any rig

The JBtek All Black Sleeved PWM Fan Splitter Cable 1 to 2 Converter (2 Pack) enables simultaneous connection and control of two PWM fans from a single motherboard header. Designed with a removed pin to prevent signal conflicts, it ensures accurate fan speed monitoring and enhanced cooling efficiency. Its sleek black sleeved design and compact form factor make it a must-have for professional PC builders and enthusiasts seeking optimized airflow without clutter.

Specifications

ASIN	B01EF9OI0O
Brand Name	JBtek
Cable Type	AUX
Color	YTGY-KL
Compatible Devices	Cellular Phones
Compatible Phone Models	Iphone
Connectivity Technology	Wired
Connector Gender	Male-to-Male
Connector Type	Auxiliary
Customer Package Type	Standard Packaging
Customer Reviews	4.7 4.7 out of 5 stars (10,568)
Indoor Outdoor Usage	Outdoor
Item Shape	Round
Item Weight	0.02 Pounds
Manufacturer	Ymdei
Model	EL0073
Number of Items	2
Other Special Features of the Product	Tangle Free
Part Number	EL0800
Recommended Uses For Product	Connecting and controlling multiple desktop computer fans
UPC	702679905487
Unit Count	2 Count

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12591CFA

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In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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