1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your PowerSpec 650W 80 Plus Bronze Certified ATX Power Supply (PSU). This PSU is designed for personal computers, offering reliable and efficient power delivery. Please read this manual thoroughly before installation and retain it for future reference.

Image 1.1: PowerSpec 650W PSU Product Parameters and Connector List.
2. Safety Information
Always observe the following safety precautions to prevent injury or damage to your equipment:
- Ensure the power supply is disconnected from the main power outlet before installation or maintenance.
- Do not open the power supply unit. High voltages are present inside, even when disconnected.
- Install the PSU in a well-ventilated area.
- Avoid exposing the PSU to moisture or extreme temperatures.
- Use only the cables provided with the power supply.
3. Key Features
- 650W Non-Modular ATX Power Supply: Provides stable power with fixed cables for essential connections.
- 80 Plus Bronze Certified: Achieves 85% efficiency or higher under typical loads, reducing energy waste and heat.
- Ultra Quiet 120mm Fan: Features a low-noise, high-airflow 120mm fan for effective cooling and quiet operation.
- Single +12V Rail Design: Offers a powerful +12V rail for compatibility with modern graphics cards and motherboards, meeting Intel ATX 12 Volt 2.5 and EPS 12V 2.92 standards.
- Japanese Capacitors: Utilizes high-quality Japanese capacitors for stable voltage output and enhanced reliability.
- Comprehensive Protection: Includes Over Voltage Protection (OVP), Under Voltage Protection (UVP), Over Power Protection (OPP), Short Circuit Protection (SCP), and Over Temperature Protection (OTP) for maximum system safety.

Image 3.1: Full Suite of Protections for the PowerSpec PS 650BF.
4. Package Contents
The PowerSpec 650W PSU includes the following fixed cables:
- Main Power (20+4-pin) x 1
- ATX 12V (4+4-pin) x 1
- PCI-E (6+2-pin) x 2
- SATA Connector x 6
- HDD Connector x 3
- FDD Connector x 1

Image 4.1: Diagram of PowerSpec 650W PSU cables and connectors.
5. Installation Guide
Follow these steps to install your PowerSpec 650W PSU:
- Prepare Your System: Ensure your computer is powered off and unplugged from the wall outlet. Open your computer case to access the PSU mounting area.
- Mount the PSU: Carefully slide the PowerSpec 650BF PSU into the designated PSU bay in your computer case. Secure it with the appropriate screws.
- Connect Main Power: Connect the 20+4-pin main power connector to your motherboard. Ensure it clicks securely into place.
- Connect CPU Power: Connect the 4+4-pin ATX 12V connector to the CPU power socket on your motherboard.
- Connect Graphics Card Power: If your graphics card requires external power, connect the PCI-E (6+2-pin) connectors. Use both connectors if your card requires two.
- Connect Peripherals: Connect SATA connectors to your SSDs, HDDs, and optical drives. Use HDD connectors for older IDE devices if necessary, and FDD for floppy drives if applicable.
- Cable Management: Route cables neatly to improve airflow and aesthetics within your case. The long cable lengths (at least 500mm) support high-end cases and facilitate cable management.
- Close Case: Once all connections are secure, close your computer case.

Image 5.1: PowerSpec 650W PSU installed within a typical PC case, demonstrating cable routing.
6. Operating Instructions
After installation, follow these steps to power on your system:
- Connect Power Cord: Plug the AC power cord into the PSU's power inlet and then into a wall outlet.
- Toggle Power Switch: Locate the independent power switch on the back of the PSU and set it to the 'ON' (I) position.
- Power On Computer: Press the power button on your computer case.

Image 6.1: Location of the independent power switch on the PowerSpec 650BF PSU.
7. Maintenance
To ensure optimal performance and longevity of your PowerSpec 650W PSU:
- Dust Removal: Periodically clean the PSU fan and vents to prevent dust buildup, which can hinder cooling performance. Use compressed air for best results. Ensure the PSU is powered off and unplugged before cleaning.
- Environmental Conditions: Operate the PSU in a clean, dry environment with adequate airflow.

Image 7.1: The 120mm ultra-quiet fan on the PowerSpec 650BF PSU, designed for efficient cooling.
8. Troubleshooting
If you encounter issues with your PowerSpec 650W PSU, refer to the following common problems and solutions:
- No Power:
- Check if the AC power cord is securely plugged into both the PSU and the wall outlet.
- Ensure the PSU's independent power switch is in the 'ON' (I) position.
- Verify all internal power connectors (20+4-pin, 4+4-pin, PCI-E) are firmly seated.
- Test the wall outlet with another device to confirm it has power.
- System Instability/Random Shutdowns:
- Ensure your system's power requirements do not exceed the PSU's 650W capacity.
- Check for proper ventilation within your PC case to prevent overheating.
- Verify all power connections are secure.
- Loud Fan Noise:
- Clean the PSU fan and vents to remove any dust buildup.
- Ensure there are no obstructions to the fan's operation.
If problems persist after trying these solutions, contact customer support.
9. Specifications
| Feature | Specification |
|---|---|
| Model Name | PS 650BF |
| Output Wattage | 650 watts |
| Form Factor | ATX12V / EPS12V |
| Efficiency Certification | 80 Plus Bronze (85% efficiency or higher) |
| Cooling Method | Air (120mm fan) |
| Product Dimensions (L x W x H) | 5.91 x 3.39 x 5.51 inches |
| Item Weight | 3 pounds |
| Main Power Connector | 20+4-pin x 1 |
| ATX 12V Connector | 4+4-pin x 1 |
| PCI-E Connector | 6+2-pin x 2 |
| SATA Connectors | x 6 |
| HDD Connectors | x 3 |
| FDD Connectors | x 1 |

Image 9.1: Power and Noise Charts for PowerSpec 650BF, illustrating 80 Plus Bronze efficiency.
10. Warranty and Support
The PowerSpec 650W PSU comes with a 5-year protection warranty, covering various safety features including OVP/UVP/OPP/SCP. For technical assistance, warranty claims, or further inquiries, please contact MicroCenter customer support. Refer to your purchase documentation for specific contact details.

