This article covers Lian Li SX 850W フルモジュラー SXP コンパクト ATX フォームファクター電源 12V-2x6ケーブル付き.

Overview

The Lian Li SX0850P.B is a compact ATX power supply delivering 850W of continuous power with Platinum efficiency. It fully supports ATX 3.1 and PCIe 5.1 standards, including a native 12V-2x6 cable for next-generation graphics cards. The unit measures only 140mm in depth, making it one of the shortest fully modular ATX PSUs in its class. With dual certification (80 PLUS Platinum and Cybenetics Platinum), it achieves up to 92% efficiency. Japanese 105°C-rated capacitors ensure long-term reliability, backed by a 10-year warranty.

Compatibility Guide

This PSU uses the standard ATX form factor and fits most ATX cases. Its 140mm depth is shorter than typical ATX units (160mm+), providing extra space for cable management in compact or crowded chassis. Connectors include a 24-pin ATX, dual 4+4-pin EPS, multiple PCIe 6+2-pin, and a 12V-2x6 (12VHPWR) connector. It is compatible with all modern motherboards and CPUs, and the 12V-2x6 cable directly powers RTX 40/50 series GPUs without adapters.

Product Info

Released in 2025, the Lian Li SX0850P.B sits in the mid-high tier of the PSU market. It combines compact dimensions with high efficiency and robust build quality. The unit features a smart fan that stops below 40% load for silent operation, and uses ultra-flexible braided cables for easy routing. The 10-year warranty reflects confidence in its longevity. It is available through major retailers and the official Lian Li store.

Best Use Cases

Compact ATX builds: The 140mm depth frees up space for cable routing and improves airflow in smaller cases like the Fractal Design North or Lian Li O11 Dynamic Mini. High-end gaming PCs with RTX 40/50 series: The native 12V-2x6 cable and 850W capacity comfortably power a mid-to-high-end GPU (e.g., RTX 4070 Ti Super to RTX 4080 Super) plus a modern CPU. * Silent PC enthusiasts: The fanless mode below 40% load keeps the system quiet during everyday tasks, while the 140mm fan remains efficient under load.

Things to Consider

While 850W is sufficient for most single-GPU builds, pairing an RTX 4090 with a high-end CPU (e.g., Core i9-14900K) may push transient spikes beyond safe limits; consider a 1000W unit for such extreme configurations. The compact size may require longer cables in full-tower cases, though the included braided cables are flexible enough for most scenarios. Competitors like the Seasonic Focus GX-850 and Corsair RM850x offer similar efficiency but lack the compact form factor. The price is competitive given the 10-year warranty and premium components.

Product Disclosure (Amazon)

  • Manufacturer: Lian Li
  • Seller: Amazon US
  • Fulfilled by: Amazon US
  • ASIN: B0FPCGCFLD
  • Note: This article covers a manufacturer-made product based on Amazon listing details.