Lian Li RB550B PSU BLACK PCIE 5.1 (12V-2×6) 80 PLUS Bronze Non-Modular Power Supply

ATX 3.1 Ready 550W Power with Next-Gen GPU Support

The Lian Li RB550B PSU BLACK PCIE 5.1 (12V-2×6) 80 PLUS Bronze Non-Modular Power Supply delivers reliable 550W of stable power delivery for everyday computing and next-generation gaming systems. With native 12V-2×6 connector support, this PSU is fully ATX 3.1 compliant, ensuring compatibility with cutting-edge graphics cards and modern CPU platforms without requiring adapters or external modules.

80 PLUS Bronze Efficiency & Compact 150mm Form Factor

Certified 80 PLUS Bronze with up to 85% energy conversion efficiency, the Lian Li RB550B maintains low operational costs while delivering consistent power to your system. Its remarkably compact 150mm ATX footprint—measuring just 86mm wide, 150mm deep, and 150mm tall—fits seamlessly into a wide range of PC cases, from mid-tower to compact builds. This space-saving design does not compromise on cable management or cooling capability, making it an ideal choice for enthusiasts building in smaller chassis.

135mm Smart Fan & Six-Layer Protection Architecture

The integrated 135mm HYB smart temperature-controlled fan intelligently adjusts cooling performance based on system demand, maintaining near-silent operation during idle periods and ramping up airflow under load. Protection against electrical anomalies is guaranteed through six independent safety mechanisms: Over-Voltage Protection (OVP), Under-Voltage Protection (UVP), Over-Current Protection (OCP), Over-Power Protection (OPP), Over-Temperature Protection (OTP), and Short-Circuit Protection (SCP). This multi-layered approach safeguards your hardware investment from power-related damage.

Complete Cable Management with Full Connector Set

The Lian Li RB550B includes a complete cable set with all necessary connectors for modern systems—CPU 4+4pin, GPU PCIe 6+2pin, SATA, and PATA connections. Built-in cable routing channels combined with adhesive Velcro straps enable professional-grade organization inside your case. Three-sided cable exits are strategically positioned for back-connector motherboards, ensuring clean installation regardless of your PC’s layout design.

Non-Modular Design for Reliability & Value

As a non-modular power supply, the Lian Li RB550B delivers maximum structural integrity and manufacturing consistency. All cables remain permanently connected, eliminating connection points that could fail over time. This design philosophy prioritizes long-term reliability and represents excellent value for builders prioritizing dependable power delivery over customizable cable management.