Lian Li SX Platinum Series ATX 3.1 PCIe 5.1 Fully Modular Black | White Power Supply – SX0850P – SX1000P – SX1200P

Uncompromising Platinum Efficiency

The Lian Li SX Platinum Series represents the pinnacle of power efficiency and thermal management. Certified 80 PLUS Platinum and PPLP Platinum, these units achieve up to 94% energy conversion efficiency at 50% load. This superior performance translates to significantly reduced AC power loss and lower heat generation, making it a cost-effective choice for long-term operation. Engineered for stability, the SX Platinum ensures precise voltage regulation using 100% Japanese industrial-grade 105°C capacitors from top-tier manufacturers like Rubycon, Nippon Chemi-Con, and Nichicon, guaranteeing durability even under high-stress conditions.

Compact 140mm Design with ATX 3.1 Compliance

Despite its massive power capabilities, the SX Platinum features an exceptionally compact 140mm length. This standard ATX form factor maximizes compatibility with a wide range of chassis, including smaller mid-towers and mATX cases like the Lian Li A3-mATX, by freeing up crucial cable routing space. The series is fully ATX 3.1 ready and PCIe 5.1 compliant, designed to handle power excursions up to 200% of its rated output. This ensures that even the most demanding next-generation graphics cards receive stable, uninterrupted power during transient load spikes.

Enhanced Safety with Dual-Color 12V-2×6 Connectors

Safety and reliability are at the core of the SX Platinum design. The unit features a native 12V-2×6 connector equipped with high-current copper alloy terminals for superior conductivity. A unique dual-color connector housing serves as a visual safety indicator; users must ensure the blue section of the connector is completely inserted and invisible to guarantee a secure connection. This thoughtful design minimizes the risk of improper insertion and enhances the overall safety of your high-performance GPU setup. Furthermore, the 1000W and 1200W models include additional cabling to support up to five PCIe 6+2 connectors, ensuring broad compatibility with high-end AMD and legacy NVIDIA cards.

Smart Cooling and Premium Aesthetics

Cooling is managed by a 120mm Fluid Dynamic Bearing (FDB) fan, housed behind a vented mesh front panel optimized for airflow. The power supply features a smart Stop/Start system that allows for completely fanless, silent operation when the load is below 40%. A physical switch on the rear allows users to toggle this hybrid mode on or off based on their preference. To complement the premium internal components, the SX Platinum includes fully modular braided cables for the motherboard, CPU, and GPU connections. These cables come with pre-installed cable combs, enabling builders to achieve a clean, professional aesthetic right out of the box.