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Two black sleeved 10-inch PWM fan splitter cables, each with one 4-pin female and three male connectors

EN-Labs

EN-Labs 121017 PWM fan splitter cable 10 in 1-to-3 2-pack

SKU CH-CZJY-6J2AQ

Splits one motherboard PWM header into three fan connections, with only one tachometer signal to prevent speed-reading conflicts, supplied as a 10-inch two-pack

  • TypeFan power splitter cable
  • ColorBlack
  • Length10 inches
  • Cable Length10 in.
  • Connector A1x TX4 female
  • Connector B3x TX3/TX4 male

Style 2-Pack

  • Connects three PWM fans to one motherboard header
  • 10-inch length keeps cable routing tidy
  • 2-pack lets you manage two headers
  • Only one fan reports RPM for stable monitoring
  • 3-pin fans run at full speed automatically

EN-Labs 121017 PWM fan splitter cable

This 2-pack provides two 10-inch cables that connect a single motherboard 4-pin PWM header to three fans. It is designed for builders who need to expand fan headers without adding a separate controller hub. Each cable carries one PWM signal and one tachometer wire to the motherboard.

Installation notes and common issues

The cable plugs directly into a standard 4-pin header and the three fan connectors are keyed for easy alignment. Only one of the three connectors includes the tachometer pin, so the motherboard reads RPM from that single fan. Builders must ensure the fan they want monitored occupies the full 4-pin branch.

Practical limits of the PWM interface

All three fans follow the same PWM duty cycle, so independent speed control is not possible. Connected 3-pin fans will run at full voltage continuously because they lack PWM input. The single tachometer wire means the motherboard cannot detect if the other two fans stall or fail.

Highlights

  • Connects three PWM fans to one motherboard header
  • 10-inch length keeps cable routing tidy
  • 2-pack lets you manage two headers
  • Only one fan reports RPM for stable monitoring
  • 3-pin fans run at full speed automatically

Specifications

BrandEn-Labs
Model121017
TypeFan power splitter cable
ColorBlack
Length10 inches
Cable Length10 in.
Connector A1x TX4 female
Connector B3x TX3/TX4 male
Connector Number4
FeaturesFeatures This TX4 4-pin multi-fan splitter cable connects to your motherboard and controls three PWM fans. Since only one RPM signal can be read by one motherboard connector, only one 4 TIPS CONNECTOR of the fan splitter cable carries an RPM signal; thus the motherboard will only read the RPM signal of the PWM device that is connected to full 4-pin connector. The other two male connectors are missing the pins of tachometric signal,ensure your fan speed monitor won't bounce all over the place from getting three sense signals.Guarantee motherboard getting an accurate RPM signal. Only o

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Questions about this item

How can I confirm the EN-Labs 121017 splitter is controlling all three fans correctly after connecting it?

Connect one fan to the full 4-pin connector and the others to the 3-pin connectors; the motherboard will display a single RPM reading from the 4-pin fan while all three fans spin at the identical PWM-controlled speed.

What comes in the box and what extra items might I need for installation?

The package contains two black 10-inch splitter cables, each with one 4-pin female header and three male headers; no additional parts are required if your motherboard has a standard 4-pin PWM header and your fans use 3-pin or 4-pin connectors.

Which version of the EN-Labs 121017 should I choose for a build that uses both 3-pin and 4-pin fans?

The single 121017 model supports both connector types — 4-pin fans receive full PWM control and RPM monitoring on the first header, while 3-pin fans run at full speed on the other two headers, all governed by the same PWM signal.

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