Rosewill SMG1200 80 Plus Gold 1200W Fully Modular Power Supply

1. Introduction

Thank you for choosing the Rosewill SMG1200 80 Plus Gold Certified 1200W Fully Modular Power Supply. This manual provides essential information for the safe installation, operation, and maintenance of your power supply unit (PSU). Please read this manual thoroughly before installation and retain it for future reference.

Safety Precautions

• 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 the unit will void the warranty.
• Ensure the PSU is installed in a well-ventilated area, free from excessive heat, humidity, or dust.
• Use only the modular cables provided with this power supply. Using incompatible cables may damage the PSU and connected components.
• This product is designed for use in personal computer systems. Do not use it for any other purpose.

2. Features

The Rosewill SMG1200 Power Supply is engineered for high performance and reliability, incorporating several key features:

• 80 Plus Gold Certified: Achieves 90% or higher efficiency under typical load conditions, reducing energy waste and operating costs. This certification ensures stable power delivery to your system.
• Fully Modular Design: Allows for superior cable management by enabling users to connect only the necessary cables. This reduces clutter, improves airflow within the PC case, and simplifies installation.
• High-Quality Japanese Capacitors: Built with 100% Japanese capacitors, ensuring long-term reliability, stability, and performance even under demanding conditions.
• Ultra-Quiet 135mm FDB Fan: Features a 135mm fan with Fluid Dynamic Bearing (FDB) technology, providing optimal cooling efficiency while maintaining low noise levels for a quieter computing experience.
• Comprehensive Protection Mechanisms: Equipped with multiple protection circuits including Short-Circuit Protection (SCP), Over-Current Protection (OCP), Over-Voltage Protection (OVP), Over-Power Protection (OPP), Under-Voltage Protection (UVP), and Over-Temperature Protection (OTP) to safeguard your components.

Image: The Rosewill SMG1200 Power Supply, showcasing its modular cable ports and 80 Plus Gold certification logo.

Quiet FDB Fan

Japanese Capacitors

Protection Features

3. Setup and Installation

Follow these steps to properly install your Rosewill SMG1200 Power Supply:

1. Unpack the PSU: Carefully remove the power supply and all modular cables from its packaging. Inspect for any visible damage.
2. Prepare Your System: Ensure your computer system is completely powered off and unplugged from the wall outlet. Open your PC case to access the PSU mounting area.
3. Mount the PSU: Insert the SMG1200 into the designated PSU bay in your PC case. Secure it with the provided screws. Ensure the fan is oriented correctly for optimal airflow (typically facing downwards if there's a bottom vent, or upwards if not).
4. Connect Essential Cables:
   • 24-pin ATX Motherboard Cable: Connect this main power cable to your motherboard.
   • 8-pin (4+4) EPS/CPU Cable: Connect to the CPU power connector on your motherboard. Some motherboards may require two such connectors.
   • PCI-E Cables (6+2 pin): Connect these to your graphics cards. Use separate cables for each GPU or for each power input on a single GPU for best stability.
5. Connect Peripheral Cables: Attach SATA power cables to your storage drives (HDDs, SSDs) and optical drives. Connect Molex cables for any other peripherals that require them.
6. Cable Management: Utilize the fully modular design to route cables neatly behind the motherboard tray or in other designated areas of your case. This improves airflow and aesthetics.
7. Final Checks: Double-check all connections to ensure they are securely seated. Close your PC case.
8. Power On: Connect the AC power cord to the PSU and then to a wall outlet. Flip the power switch on the PSU to the 'ON' position. You can now power on your computer.

4. Operating Instructions

Operating the Rosewill SMG1200 Power Supply is straightforward once installed:

• Power On/Off: The main power switch on the back of the PSU controls the power flow to the unit. Ensure it is in the 'ON' position for your computer to receive power.
• System Startup: Once the PSU is powered on, you can start your computer using the case's power button.
• Normal Operation: The PSU will automatically regulate power delivery to your components based on their demand. The 135mm FDB fan will operate to maintain optimal temperatures within the PSU.
• Shutdown: Always shut down your computer through the operating system. Only flip the PSU's main power switch to 'OFF' when performing maintenance or when the system will be off for an extended period.

5. Maintenance

Regular maintenance helps ensure the longevity and optimal performance of your Rosewill SMG1200 Power Supply:

• Dust Cleaning: Periodically clean dust from the PSU's fan and vents using compressed air. Ensure the system is powered off and unplugged before cleaning. Hold the fan blades gently to prevent over-spinning during cleaning.
• Cable Management: Regularly check that all modular cables are securely connected and neatly routed to avoid obstructing airflow.
• Environmental Conditions: Ensure your PC operates in a clean, dry, and well-ventilated environment. Avoid placing the computer near heat sources or in direct sunlight.

6. Troubleshooting

If you encounter issues with your Rosewill SMG1200 Power Supply, consider the following troubleshooting steps:

• No Power:
  • Check if the AC power cord is securely plugged into both the PSU and the wall outlet.
  • Ensure the PSU's main power switch is in the 'ON' position.
  • Verify that the 24-pin ATX and 8-pin EPS/CPU cables are correctly and firmly connected to the motherboard.
  • Test the wall outlet with another device to confirm it has power.
• System Instability/Random Restarts:
  • Ensure all power cables (especially to the GPU) are securely connected.
  • Check for proper ventilation within your PC case to prevent overheating of components, including the PSU.
  • If you have recently added new components, ensure your total power draw does not exceed the PSU's 1200W capacity.
• Loud Fan Noise:
  • Clean any dust accumulation from the PSU fan and vents.
  • Ensure there are no cables or obstructions interfering with the fan blades.

If these steps do not resolve the issue, contact Rosewill customer support for further assistance.

7. Specifications

8. Warranty and Support

The Rosewill SMG1200 Power Supply comes with a 5-year warranty, assuring continuous system performance and peace of mind. For warranty claims, technical support, or any inquiries, please contact Rosewill customer service through their official website or the contact information provided with your purchase.

Please retain your proof of purchase for warranty validation.