1. Product Overview
The CORSAIR CX750 is an 80 PLUS Bronze certified non-modular ATX power supply designed to provide reliable and efficient power to your PC. It features a 120mm thermally controlled low-noise cooling fan for quiet operation and a compact design for easy installation in most modern PC cases.
Key Features
- 80 PLUS Bronze Certified: Achieves up to 88% operational efficiency, reducing heat generation and energy consumption.
- Full Continuous Power: Delivers its full rated wattage consistently.
- Low-Noise Cooling: Equipped with a 120mm thermally controlled fan that operates quietly under typical loads.
- Compact Casing: Measures 125mm in length for broad compatibility with PC cases.
- Integrated Cables: Features black sleeved cables and a black powder-coated casing for a clean aesthetic.
2. Installation Guide
2.1 Safety Precautions
- Always disconnect the power cord from the wall outlet before installing or removing the power supply.
- Ensure your computer case is properly grounded.
- Avoid contact with internal components of the power supply. High voltages are present.
- Do not attempt to repair the power supply yourself. Refer to qualified service personnel.
2.2 Physical Installation
- Prepare your PC Case: Open your PC case and locate the power supply mounting area, typically at the rear top or bottom.
- Mount the Power Supply: Gently slide the CORSAIR CX750 into the designated slot. Ensure the fan faces the correct direction for optimal airflow (usually facing down if there's a bottom vent, or up if not). Secure the power supply to the case using the provided screws.
2.3 Cable Connections
The CORSAIR CX750 is a non-modular power supply, meaning all cables are permanently attached. Connect the necessary cables to your motherboard and components.
- 24-pin ATX Cable: Connect to the main power connector on your motherboard.
- 8-pin (4+4) ATX 12V/EPS12V Cable: Connect to the CPU power connector on your motherboard.
- 6+2-pin PCIe Cables: Connect to your graphics card(s) as required.
- SATA Power Cables: Connect to SATA devices such as SSDs, HDDs, and optical drives.
- PATA (Molex) Power Cables: Connect to older peripherals or case fans if needed.
Ensure all connections are firm and properly seated. Route cables neatly to improve airflow and aesthetics within your PC case.
3. Operation
3.1 Initial Power-On
- After all components are connected and the case is closed, connect the AC power cord to the power supply and then to a wall outlet.
- Flip the power switch on the back of the power supply to the 'ON' (I) position.
- Press the power button on your PC case to start the system.
3.2 Fan Operation
The CORSAIR CX750 features a 120mm thermally controlled fan. This fan is designed to operate quietly, spinning at higher speeds only when the power supply is under heavy load. At lower loads, the fan speed will decrease, resulting in quieter operation.
4. Maintenance
Proper maintenance ensures the longevity and optimal performance of your power supply.
- Dust Removal: Periodically clean the power supply's fan and ventilation grilles using compressed air. Ensure the system is powered off and unplugged before cleaning.
- Environmental Conditions: Operate the power supply in a well-ventilated area, free from excessive dust, humidity, and extreme temperatures.
- Cable Management: Ensure cables are not obstructing airflow within the PC case.
5. Troubleshooting
If you encounter issues with your CORSAIR CX750 power supply, refer to the following common troubleshooting steps:
5.1 No Power / System Not Starting
- Check Power Connections: Ensure the AC power cord is securely plugged into both the power supply and the wall outlet.
- Verify Power Switch: Confirm the power supply's ON/OFF switch is in the 'ON' (I) position.
- Internal Connections: Double-check that the 24-pin ATX and 8-pin CPU power cables are firmly connected to the motherboard. Also, ensure PCIe power cables are connected to your graphics card(s).
- Test Wall Outlet: Try plugging another device into the wall outlet to confirm it is functional.
- Isolate Components: If possible, disconnect all non-essential components (e.g., extra drives, peripherals) and attempt to power on the system with only the motherboard, CPU, and one stick of RAM connected.
5.2 System Instability / Random Shutdowns
- Overload Check: Ensure your system's total power consumption does not exceed the 750W capacity of the power supply. Use an online PSU calculator if unsure.
- Ventilation: Verify that the power supply fan and case ventilation are not obstructed, preventing proper cooling.
- Component Issues: Instability can also be caused by other faulty components (RAM, CPU, GPU). If the PSU is suspected, testing with another known-good power supply may be necessary.
6. Technical Specifications
| Feature | Specification |
|---|---|
| Model Name | CX750 |
| Model Number | CP-9020279-NA |
| Brand | Corsair |
| Output Wattage | 750 Watts |
| 80 PLUS Certification | Bronze |
| Form Factor | ATX |
| Power Supply Design | Non-Modular |
| Cooling Method | Air (120mm fan) |
| Item Dimensions (L x W x H) | 125mm x 150mm x 86mm (4.92 x 5.91 x 3.39 inches) |
| Item Weight | 4.4 pounds |
| Maximum Input Voltage | 132 volts AC |
| Minimum Input Voltage | 115 volts |
| Main Connector | 24 Pin ATX |
| Number of Fans | 1 |
| UPC | 840006671053 |
7. Warranty and Support
7.1 Manufacturer's Warranty
The CORSAIR CX750 Power Supply is covered by a 3-year manufacturer's warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.
7.2 Technical Support
For technical assistance, troubleshooting, or warranty inquiries, please visit the official Corsair support website or contact their customer service.
