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Rectangular 3.5 inch bay unit with four rotary knobs and blue LED illumination

SXDOOL

SXDOOL 3.5" 4-Channel Fan Controller Blue LED

SKU CH-RXPV-GKRYE

A 3.5" drive-bay unit that adjusts four 3-pin fans from 30 % to 100 % speed with blue LED indication, powered by a Molex LP4 connector

  • Power ConnectorLP4
  • Four-channel fan speed control via front-mounted knobs
  • Fits a standard 3.5" floppy drive bay
  • Blue LED indicates power status on each channel
  • Molex LP4 connector supplies 12 V to all channels
  • Supports TX3 3-pin fans with 60 cm cables

Four-Channel Speed Control

The SXDOOL STW-6002 is a 3.5-inch fan controller designed for PC builders who want manual speed adjustment for up to four cooling fans. It mounts in a standard floppy drive bay and draws power from a Molex LP4 connector, making it a straightforward add-on for desktop systems. The unit provides a 30% to 100% speed range across all channels, giving users direct control over airflow and noise levels. It suits enthusiasts who prefer tactile knobs over software-based fan curves.

Front-Panel Knobs and Blue LED

Build quality centres on a compact chassis measuring 10.1 by 9.5 by 2.5 mm that secures with four included mounting screws. Four volume-style knobs on the faceplate adjust each channel independently, while a blue LED illuminates when the unit receives power. The controller supports only TX3 3-pin fans, and each of the four connecting cables runs 40.0 cm from the main body. Power is delivered via a 12 V LP4 Molex plug, with a total output ceiling of 30 W and a maximum current of 2.8 A across all channels.

Replaces Fixed-Speed or Motherboard-Only Cooling

This controller upgrades systems where fans run at constant voltage or where motherboard headers are insufficient for the number of fans installed. It is worth the jump when a builder needs independent, per-fan speed tuning without relying on BIOS or software utilities. The 30% minimum speed allows quieter idle operation than many fixed 12 V connections provide. Buyers who need PWM 4-pin control, more than four channels, or software integration should look elsewhere.

Highlights

  • Four-channel fan speed control via front-mounted knobs
  • Fits a standard 3.5" floppy drive bay
  • Blue LED indicates power status on each channel
  • Molex LP4 connector supplies 12 V to all channels
  • Supports TX3 3-pin fans with 60 cm cables

Specifications

Power ConnectorLP4

Questions about this item

What does the LP4 Molex connector limit the controller to in practice?

The LP4 Molex connector supplies 12 V only, so the controller operates between 5.5 and 12.7 V DC with a total output capped at 30 W and 2.8 A.

What physical space and mounting does the unit require?

It fits a standard 3.5" floppy drive bay measuring 10.1 × 9.5 × 2.5 mm and includes four mounting screws.

How is it installed and which step is often missed?

Mount the controller in the 3.5" bay, plug the LP4 Molex for power, then connect up to four TX3 3-pin fans using the 40 cm leads; the step often missed is confirming every fan is a 3-pin TX3 type because 4-pin PWM fans are not supported.

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