The Corsair CX750M power supply unit is known for its reliable performance and ease of use. However, when it comes to wiring it up, things can get a little confusing for some users. In this article, we’ll provide a step-by-step guide on how to properly wire up your CX750M PSU, complete with a detailed wiring diagram, frequently asked questions, and tips for troubleshooting common issues.
What You’ll Need
Before you start wiring up your Corsair CX750M PSU, you’ll need the following items:
- Corsair CX750M PSU
- Power cables (included with PSU)
- Motherboard manual
- Graphics card manual (if applicable)
- SSD/HDD manual (if applicable)
Wiring Diagram
Below is a detailed wiring diagram for the Corsair CX750M PSU:
| Connector | Color | Pinout |
|---|---|---|
| 24-pin ATX | Black | 1. +3.3V 2. +3.3V 3. GND 4. +5V 5. GND 6. +5V 7. GND 8. PWR_OK 9. +5VSB 10. +12V 11. +12V 12. GND 13. +3.3V 14. +3.3V 15. +5V 16. GND 17. +5V 18. GND 19. +5V 20. GND 21. +5V 22. GND 23. +5V 24. GND |
| 8-pin EPS | Yellow | 1. +12V 2. +12V 3. GND 4. GND 5. +5V 6. GND 7. GND 8. +3.3V |
| 8-pin PCIe (x2) | Red | 1. +12V 2. +12V 3. GND 4. GND 5. +12V 6. +12V 7. GND 8. GND |
| 6-pin PCIe (x2) | Yellow | 1. +12V 2. +12V 3. GND 4. GND 5. +12V 6. GND |
| SATA (x8) | Black | 1. +3.3V 2. +3.3V 3. GND 4. +5V 5. GND 6. +5V 7. GND 8. +12V |
| Molex (x4) | Black | 1. GND 2. GND 3. +5V 4. +12V |
| Floppy | Red | 1. +5V 2. GND 3. GND 4. +12V |
Wiring Instructions
Now that you have all the necessary items, it’s time to start wiring up your Corsair CX750M PSU. Follow the steps below:
Step 1: Connect the 24-pin ATX cable
The 24-pin ATX cable is the largest cable that comes with your PSU. It usually has a black connector and is labeled “ATX” or “ATX_24”. Locate the 24-pin ATX socket on your motherboard and plug the cable in, making sure that the connectors on the cable match the pins on the socket. The cable should snap into place.
Step 2: Connect the 8-pin EPS cable
The 8-pin EPS cable provides power to your CPU. It usually has a yellow connector and is labeled “CPU” or “EPS”. Locate the 8-pin EPS socket on your motherboard and plug the cable in, making sure that the connectors on the cable match the pins on the socket. The cable should snap into place.
Step 3: Connect the PCIe cables
The PCIe cables provide power to your graphics card. If your graphics card requires an 8-pin connector, connect two 8-pin PCIe cables to the PSU. If your graphics card requires a 6-pin connector, connect two 6-pin PCIe cables to the PSU. Locate the PCIe sockets on your graphics card and plug the cables in, making sure that the connectors on the cables match the pins on the sockets. The cables should snap into place.
Step 4: Connect the SATA and Molex cables
The SATA and Molex cables provide power to your SSD/HDD and other peripherals such as fans and RGB strips. Connect the SATA and Molex cables to the PSU and plug them into the appropriate sockets on your SSD/HDD and peripherals. Make sure that the connectors on the cables match the pins on the sockets. The cables should snap into place.
Step 5: Connect the Floppy cable (if applicable)
If you have a legacy floppy drive, connect the Floppy cable to the PSU and plug it into the appropriate socket on your floppy drive. Make sure that the connectors on the cable match the pins on the socket. The cable should snap into place.
Frequently Asked Questions
Q1: What is the difference between the 24-pin ATX and 20-pin ATX cables?
A: The 24-pin ATX cable provides more power to your motherboard compared to the 20-pin ATX cable. Most modern motherboards require a 24-pin ATX socket, but some older motherboards may only require a 20-pin ATX socket. If your PSU only has a 20-pin ATX cable, you can use a 20-to-24-pin adapter to connect it to your motherboard.
Q2: Can I use a 6-pin PCIe cable for an 8-pin PCIe socket?
A: No, you should never use a cable that doesn’t match the socket requirements. Using the wrong cable can cause damage to your hardware.
Q3: What do I do if my hardware isn’t turning on?
A: Make sure that all the cables are properly connected and seated. Check that the power switch on the back of the PSU is turned on. If everything appears to be connected correctly and the hardware still isn’t turning on, check for any error codes or troubleshooting tips in your motherboard manual or hardware manufacturer’s website.
Troubleshooting Tips
Tip 1: Check for loose connections
If your hardware is intermittently turning on or not turning on at all, check all the connections to make sure they are properly seated. Loose connections can cause hardware to not receive enough power.
Tip 2: Check for faulty hardware
If your hardware is still not turning on after checking for loose connections, check for any error codes or troubleshooting tips in your motherboard manual or hardware manufacturer’s website. It’s possible that you may have a faulty component that needs to be replaced.
Tip 3: Check for voltage output
If you suspect that your PSU may be faulty, use a multimeter to check the voltage output on the cables. The 24-pin ATX and 8-pin EPS cables should output around 12 volts, while the PCIe cables should output around 6 or 12 volts depending on the connector type.
Conclusion
Wiring up your Corsair CX750M PSU may seem intimidating at first, but with the proper instructions and a little bit of practice, you’ll be able to easily connect all your hardware components. Remember to always double-check your connections, use the correct cables, and follow the guidelines provided by your motherboard and hardware manuals. Happy building!
