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