1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your Lian Li SX Platinum 850W SXP Compact ATX Form Factor Power Supply. Designed for high-performance systems, this power supply unit (PSU) adheres to ATX 3.1 and PCIe 5.1 standards, offering stable and efficient power delivery. Please read this manual thoroughly before installation and retain it for future reference.
2. Safety Information
Warning: Improper installation or use can lead to equipment damage, electric shock, or serious injury. Always follow these safety guidelines:
- Ensure the power supply is disconnected from the AC power outlet before installation or maintenance.
- Do not open the PSU casing. High voltages are present inside, even when disconnected.
- Install the PSU in a well-ventilated area, away from heat sources and moisture.
- Use only the modular cables provided with this power supply. Using incompatible cables can cause damage.
- Ensure all cables are securely connected before powering on the system.
3. Package Contents
Verify that all components are present in your package:
- Lian Li SX Platinum 850W SXP Power Supply Unit
- Modular Cable Set (including 12V-2x6 cable)
- AC Power Cord
- Mounting Screws
- User Manual
Video Description: An unboxing video demonstrating the contents of the Lian Li SXP Platinum PSU package, showing the power supply unit and its accessories being removed from the box.
4. Key Features
- Ample PCIe 6+2 Connectors: Easily power multiple accessories, including the LIAN LI Universal USB and fan hub, ensuring a versatile setup without limitations for any build.
- Smart Cooling Technology: Features fanless mode at ≤40% load for silent operation, while maintaining optimal temperatures during high loads for enhanced performance and longevity. Fanless mode can be turned off for excellent noise control.
- Flexible Braided Cables: Super flexible DC cables facilitate effortless cable management, reducing clutter and improving airflow in tight or complex builds.
- 80 Plus Platinum Certified: Achieves up to 92% efficiency at 50% load, ensuring cooler, quieter, and more energy-efficient operation with stable voltage regulation.
- 105°C-Rated Capacitors: Built with 100% Japanese 105°C-rated capacitors for exceptional durability and stable performance, even under high thermal stress.
Image Description: A close-up view of the PSU's vented front panel, highlighting the patterned open-mesh design for improved airflow and cooling performance.
Image Description: A diagram illustrating the various modular connectors on the PSU, emphasizing the ample PCIe 6+2 power support for multiple devices.
Image Description: An illustration showcasing the internal 100% Japanese Rubycon 105°C capacitors, highlighting their quality and durability.
5. Installation Guide
Follow these steps to install your Lian Li SX Platinum 850W SXP Power Supply:
- Prepare Your System: Ensure your computer is completely powered off and unplugged from the wall outlet. Open your computer case to access the PSU mounting area.
- Mount the PSU: Carefully slide the PSU into the designated bay in your computer case. Secure it with the provided mounting screws.
- Connect Essential Cables:
- Connect the 24-pin ATX motherboard power cable.
- Connect the 4+4-pin or 8-pin CPU power cable(s) to your motherboard.
- Connect the 12V-2x6 (12+4 pin) PCIe 5.1 cable to your compatible graphics card, ensuring the blue section is fully inserted.
- Connect Peripheral Cables: Attach any necessary SATA power cables for storage drives (SSDs/HDDs) and peripheral cables for fans, pumps, or other accessories.
- Cable Management: Utilize the flexible braided cables and cable combs to route and organize your cables for optimal airflow and a clean build.
- Final Checks: Double-check all connections to ensure they are secure. Close your computer case.
- Power On: Plug the AC power cord into the PSU and then into a wall outlet. Flip the power switch on the back of the PSU to the 'ON' position. Power on your computer.
Image Description: A visual representation of the PSU's compact dimensions (140mm length) installed in a computer case, demonstrating its compatibility and space-saving design.
Image Description: A close-up view of the braided modular cables and cable combs, illustrating how they contribute to a clean and organized PC build.
6. Cable Configuration
The Lian Li SX Platinum 850W SXP PSU is fully modular, allowing you to connect only the cables required for your system. Below is a table detailing the included cables and their lengths:
| Connector Type | Connector | Quantity (850W) | Cable Length |
|---|---|---|---|
| Main Power (20+4 Pin) | 1 | 600mm | |
| ATX 12V (4+4 Pin) | 2 | 700mm | |
| PCIe (8 Pin) | 2 | 550mm | |
| PCIe (6+2 Pin) | 1 | 550mm+150mm | |
| 12V-2x6 to Dual PCIe (6+2 Pin) | 0 | N/A (Not included with 850W model) | |
| SATA (5 Pin) | 2 | 400mm+150mm+150mm+150mm | |
| Peripheral (4 Pin) | 1 | 400mm+150mm+150mm | |
| PCIe (12V-2x6) | 1 | 600mm |
Image Description: A visual diagram detailing the various cable types, connectors, and their quantities included with the PSU, along with their respective lengths.
7. Operating Instructions
The Lian Li SX Platinum 850W SXP PSU features a Smart Stop/Start fan mode for quiet operation under low loads.
- Smart Stop/Start Mode: When the PSU load is at or below 40%, the fan will enter a fanless mode, providing silent operation. As the load increases above 40%, the fan will automatically start to maintain optimal temperatures.
- Fan Mode Switch: This feature can be enabled or disabled using the switch located on the rear of the unit. Set to 'ON' for Smart Stop/Start mode (fanless at low load) or 'OFF' for continuous fan operation.
Image Description: A close-up of the rear panel of the PSU, showing the power switch and the separate 'OFF/ON' switch for controlling the Smart Stop/Start fan mode.
Image Description: A graph illustrating the fan speed (RPM) and noise level (dB) of the SX0850P power supply across different power outputs, with separate curves for fan 'ON' and fan 'OFF' (Smart Stop/Start) modes.
8. Specifications
| Feature | Value |
|---|---|
| Product Name | SX0850P |
| Model | SX0850P |
| Dimensions (W x H x D) | 150 x 86 x 140 mm (5.91 x 3.39 x 5.51 inches) |
| Color | Black/White (model dependent) |
| ATX Version | ATX 3.1 |
| Efficiency Certification | 80 PLUS Platinum |
| Max. DC Output | 850W |
| Combined +3.3V/+5V Output | 100W |
| Combined +12V Output | 849.6W |
| Input Voltage Range | 100-240Vac |
| Input Current Range | 6-12A, 50-60Hz |
| Power Factor Correction (PFC) | Active PFC, PF > 0.96 at full load |
| Protection | OPP/NLP/OVP/OCP/OTP/UVP/SIP |
| Fan Type | 120 mm FDB fan |
| Max. Fan Speed | 2000RPM |
| Average Fanless Operating Time | Minimum 100,000 hours (@ 25°C / 75% load) |
| Hardware Protection | 10 Years |
Image Description: A comprehensive table outlining the detailed specifications for the SX0850P, SX1000P, and SX1200P models, including dimensions, output, efficiency, and protection features.
9. Maintenance
Proper maintenance ensures the longevity and optimal performance of your PSU:
- Cleaning: Periodically clean the exterior of the PSU and the fan grille to prevent dust buildup. Use compressed air to gently clear dust from the fan and vents. Ensure the PSU is unplugged before cleaning.
- Airflow: Ensure your computer case has adequate airflow. Blocked vents can lead to overheating and reduced efficiency.
- Cable Integrity: Regularly check that all modular cables are securely seated and free from damage.
10. Troubleshooting
If you encounter issues with your PSU, refer to the following common troubleshooting steps:
- No Power:
- Check if the AC power cord is securely connected to both the PSU and the wall outlet.
- Ensure the power switch on the back of the PSU is in the 'ON' position.
- Verify that all internal power cables (24-pin, CPU, PCIe) are correctly and firmly connected.
- Test the wall outlet with another device to confirm it has power.
- System Instability/Crashes:
- Ensure your PSU wattage is sufficient for all your system components, especially the graphics card.
- Check for loose cable connections.
- Monitor system temperatures to rule out overheating.
- Fan Noise:
- If the fan is constantly running at high speed, check the PSU load. The Smart Stop/Start feature keeps the fan off at ≤40% load.
- Ensure the fan mode switch on the rear of the PSU is set to 'ON' for silent operation at low loads.
- Clean any dust buildup from the fan and vents.
If problems persist after following these steps, please contact Lian Li customer support.
11. Warranty and Support
The Lian Li SX Platinum 850W SXP Power Supply comes with a 10-year hardware protection warranty, ensuring long-term stability and peace of mind. This warranty covers defects in materials and workmanship under normal use.
For missing parts, cable color issues, or any other technical support inquiries, please reach out to Lian Li customer support. You can typically find contact information on the official Lian Li website or through your retailer.
Image Description: A display of the Lian Li SX Platinum series power supplies available in both black and white finishes, across 850W, 1000W, and 1200W options.
Video Description: An official product video showcasing the features and design of the Lian Li SX Series PSUs, highlighting their compact form factor, modularity, and aesthetic appeal.
