1. Introduction
Thank you for choosing the Aigo AP Series Power Supply Unit (PSU). This manual provides essential information for the proper installation, operation, and maintenance of your new power supply. The AP Series PSUs are designed for gaming and desktop computers, offering reliable power with 80 PLUS 230V EU efficiency.

2. Safety Information
- Always disconnect the power cord from the wall outlet before installing or removing the PSU or any other components.
- Do not open the PSU casing. High voltages are present inside, and opening it will void your warranty.
- Ensure proper grounding to prevent electrical hazards.
- Install the PSU in a well-ventilated area to prevent overheating.
- This product is designed for indoor use only. Do not expose to moisture or extreme temperatures.
3. Installation Guide
3.1 Unpacking and Inspection
Carefully remove the PSU from its packaging. Inspect for any signs of physical damage. If damage is found, contact your retailer immediately.
3.2 Mounting the PSU
- Ensure your computer case is compatible with ATX PSUs.
- Position the PSU in the designated PSU bay of your computer case, typically at the bottom or top rear. Ensure the fan is oriented correctly for optimal airflow (usually facing downwards if there's a vent, or inwards if not).
- Secure the PSU to the case using the provided screws. The four silicone pads on the PSU help reduce power and chassis co-vibration.

3.3 Connecting Cables
The Aigo AP Series PSUs are non-modular. Connect the necessary cables to your motherboard and components. Refer to your motherboard and component manuals for specific connection points.
- 20+4 Pin Main Power Connector: Connect to the motherboard's main power socket.
- P8 (4+4) Pin CPU Power Connector: Connect to the CPU power socket on the motherboard. (2 connectors provided)
- PCI-E (6+2) Pin Graphics Card Power Connector: Connect to your graphics card(s). (2 connectors provided)
- SATA Power Connectors: Connect to SATA devices such as SSDs, HDDs, and optical drives. (4 connectors provided)
- IDE (4 Pin) Power Connectors: Connect to older peripherals or case fans. (2 connectors provided)

Ensure all connections are firm and secure. Avoid excessive force when plugging in connectors.
4. Operating Instructions
4.1 Powering On
- After all components are connected, ensure the power switch on the back of the PSU is in the 'OFF' (0) position.
- Connect the AC power cord to the PSU and then to a wall outlet.
- Flip the power switch on the back of the PSU to the 'ON' (I) position.
- Press the power button on your computer case to start your system.
4.2 Fan Operation
The Aigo AP Series PSUs feature a 120mm hydraulic fan with temperature-controlled PWM (Pulse Width Modulation). This means the fan speed adjusts automatically based on the PSU's internal temperature, providing efficient cooling while maintaining a very low noise level during lighter loads.

5. Maintenance
- Cleaning: Periodically clean the PSU's fan and ventilation grilles to prevent dust buildup, which can impede airflow and lead to overheating. Use compressed air to gently remove dust. Ensure the PSU is powered off and unplugged before cleaning.
- Environment: Operate the PSU in a clean, dry, and well-ventilated environment. Avoid placing objects directly on or near the PSU that could block airflow.
6. Troubleshooting
The Aigo AP Series PSUs are equipped with multiple protection mechanisms to ensure user safety and component longevity. These include:
- OPP (Over Power Protection): Prevents damage from excessive power draw.
- OVP (Over Voltage Protection): Protects components from voltage spikes.
- OCP (Over Current Protection): Guards against excessive current on output rails.
- UVP (Under Voltage Protection): Shuts down the PSU if voltage drops below safe levels.
- SCP (Short Circuit Protection): Prevents damage from short circuits.
- OTP (Over Temperature Protection): Shuts down the PSU if internal temperatures become too high.

Common Issues and Solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| System does not power on. | Loose power connections, PSU switch off, faulty components. | Check all power cable connections (20+4 pin, CPU, GPU). Ensure PSU switch is 'ON'. Test with minimal components. |
| System powers on but immediately shuts down. | Overload (OPP), short circuit (SCP), overheating (OTP). | Reduce load, check for short circuits, ensure adequate ventilation. |
| System instability or random reboots. | Insufficient power, voltage fluctuations (OVP, UVP). | Ensure PSU wattage is sufficient for your components. Check for loose connections. |
| Fan is excessively loud. | Dust buildup, high load/temperature. | Clean the fan and vents. Ensure good case airflow. Fan speed will increase with higher load. |
7. Specifications
| Feature | Description |
|---|---|
| Brand Name | Aigo |
| Model Number | AP Series (AP550, AP650, AP750) |
| Rated Power | 550W / 650W / 750W |
| 80 PLUS Certification | 80 PLUS 230V EU |
| PFC Type | Active PFC |
| Modular | Non-Modular |
| Input Voltage | 200-240Vac |
| Input Current | 8.0A (for 650W model) |
| Input Frequency | 50Hz |
| Efficiency | Up to 86.42% (80 PLUS 230V EU certified) |
| Dimensions (WxDxH) | 140mm x 150mm x 86mm |
| Fan Size | 120mm Hydraulic Fan with PWM temperature control |
| Application | Desktop, Server, Mining |
| Protection Mechanisms | OPP, OVP, OCP, UVP, SCP, OTP |
| Interface Type (Main) | 20 + 4Pin |
| CPU Power Connector | 8 pin x2 + 4 pin (P8(4+4)Pin x2) |
| Graphics Card 12V Pin Number | 8 pin +2 x6 pin (PCI-E 6+2Pin x2) |
| Number of SATA Ports | 4 |
| D-type Bus Number (IDE) | 2 |
| Certifications | CE, FCC, RoHS, CB, CCC, Class B |


8. Warranty and Support
The Aigo AP Series Power Supplies come with a 3-year warranty. This warranty covers defects in materials and workmanship under normal use. For warranty claims or technical support, please contact your retailer or the official Aigo support channels.

9. User Tips
- Cable Management: Although non-modular, take time to route cables neatly within your PC case. This improves airflow and makes future upgrades or maintenance easier.
- Power Calculation: Before purchasing, always calculate the total wattage required by your PC components to ensure you select an AP Series PSU with adequate power (550W, 650W, or 750W).
- Ventilation: Ensure your PC case has good airflow to help the PSU's 120mm fan dissipate heat effectively, contributing to a quieter and more stable system.





