This product is a professional-grade PC fan power splitter that can expand a single large 4-pin power connector into four small 4-pin/3-pin fan connectors, providing three voltage outputs of 12V/7V/5V. It uses 22AWG high-specification cables and tin-plated copper conductors to ensure stable power supply and safe operation, making it an ideal solution for addressing insufficient motherboard fan interfaces, optimising case airflow layout, and reducing fan noise. Core Features Intelligent Three-Speed Adjustment System 12V Full-Speed Mode (White Connector): Provides standard 12V voltage output, enabling the fan to operate at 100% speed, suitable for high-load cooling requirements 7V Quiet Mode (Blue Connector): Outputs 7V voltage, reducing fan speed by approximately 40%, significantly reducing noise while maintaining effective cooling 5V Ultra-Quiet Mode (black connector): Outputs 5V voltage, allowing the fan to run at the lowest speed, suitable for night use or low-power environments Efficient Power Distribution Design Adopts a parallel circuit design to ensure stable voltage at all output ports Supports up to 4 standard 120mm fans running simultaneously (total power not exceeding 36W) Scientific wire sequence arrangement to avoid electromagnetic interference Professional-grade cable construction Conductor: 17×0.14TS tin-plated copper core, corrosion-resistant and oxidation-resistant Insulation: 1007 standard PVC material, temperature-resistant up to 80°C Wire gauge: 22AWG specification, 1.6mm outer diameter Interface: Large 4-pin connector with anti-misinsertion design, small connector with reinforced plug-and-play structure Technical Specifications Details Item Parameter Input Interface Large 4-pin Male (Molex 8981) Output Interface 2×12V (White) + 1×7V (Blue) + 1×5V (Black) Rated Voltage 12V ±10% / 7V ±5% / 5V ±5% Maximum Current 3A (per channel) Cable Length 12cm ± 0.5cm Conductor Specification 22AWG (0.33mm²) Insulation Resistance ≥20MΩ Withstand Voltage 500V AC/1min Plugging Life ≥500 times Application Scenarios High-performance gaming PCs: Provides sufficient power for multi-fan systems Quiet office computers: Enables low-noise operation via 7V/5V interfaces Servers/NAS: Expands multiple cooling fan interfaces Water cooling systems: Centralised power supply for water pumps and cooling fans Cabinet equipment: Industrial-grade cooling solutions Installation Guide Ensure the power supply is disconnected Connect the large 4-pin interface to the power supply's D-type port (note the anti-reverse direction) Connect fans as needed: High-speed devices connect to the white 12V interface Balanced devices connect to the blue 7V interface Noise-sensitive devices connect to the black 5V interface It is recommended to secure cables with cable ties to ensure proper routing Notes This product only provides power transmission and does not support PWM speed control or speed monitoring Total load power must not exceed 36W (12V × 3A) Avoid using in high-temperature (＞80℃) or humid environments Do not excessively bend the cables (minimum bending radius ＞15mm) 7V/5V output may cause some fans to start with difficulty
Three speed settings, freely selectable 12Vx2 (white connector) - Fan runs at full speed, suitable for high-performance cooling. 7V (blue connector) - Noise reduction mode, balances airflow and noise. 5V (black connector) - Ultra-low speed, extremely quiet, suitable for night-time or low-load use.
One-to-four expansion, highly expandable Can connect 4 fans simultaneously, solving the problem of insufficient motherboard interfaces. Compatible with 3-pin & 4-pin fans (power supply only, does not support speed measurement/PWM speed control).
High-quality wire, stable and durable. 22AWG tinned copper wire (1007 standard), good conductivity, oxidation resistance. PVC insulation layer, high temperature resistance (80℃), safe and reliable. Wire length 12cm, diameter 1.6mm, weight only 10g, convenient for wiring.
Usage Scenarios The extension has two 12V ports, one 7V port, and one 5V port, allowing you to select the speed and airflow of the fan and adjust the speed.
Plug and play, easy installation. Directly connect to the power supply D port (large 4-pin), no additional drivers required. Suitable for chassis fans, water cooling fans, hard drive cooling fans, etc.
