The Lian Li RB Series 550W is a compact and efficient power supply designed for beginners and cost-conscious gamers. It provides stable performance, uses high-quality electrolytic capacitors, and its semi-modular design allows for easy installation. It provides up to 85% efficiency at half load, which is confirmed by the 80 PLUS Bronze certificate.

- 550 W reliable power: ideal for entry-level gaming PCs
- 80 PLUS Bronze: 85% efficiency at 50% load
- Semi-modular design: the basic cables are fixed, the optional ones can be connected modularly
- Organized cabling: integrated Velcro straps on three sides
- Modern standard: ATX 3.1 compatible
- Silent cooling: 135 mm HDB fan

Reliable performance
The Lian Li RB 550W power supply uses high-quality electrolytic capacitors that provide a stable and consistent power supply even at temperatures up to 40 °C. This results in high efficiency and 80 PLUS Bronze certification (85% efficiency at half load).

Modern semi-modular design
Installation is simple and convenient: the 24-pin ATX and CPU-EPS cables are fixed, while the PCIe 6+2-pin cable supplies the graphics card.
SATA and peripheral cables can be added via modular connectors, so only those that are actually needed are used. This reduces cable clutter and provides better airflow in the house.
Velcro straps integrated on three sides help to easily fix unnecessary cables, so the system remains more transparent and organized.

Modern standard: ATX 3.1
The RB Series 550W complies with the latest ATX 3.1 standard, which guarantees the fulfillment of modern protection, energy efficiency and load management requirements. This provides a reliable and future-proof foundation for all modern PCs.

- Quiet and efficient cooling
- 135mm HDB fan – larger than the conventional 120mm
- Better airflow at lower rpm
- Noise level: 33.2 dB(A) at 1,300 RPM
- Stable temperature even under heavy load

The larger fan moves more air at a lower speed, keeping the power supply cool and quiet even during extended gaming sessions.