Lian Li RB Series 80 PLUS Bronze...

550-watt power supply with 80 PLUS Bronze certification (85% efficiency), semi-modular design, integrated cable management, quiet 135mm HDB fan, and PCIe 5.1 and ATX 3.1 compatibility

The Lian Li RB Series 550W is a compact and efficient power supply designed for beginners and budget-conscious gamers. It delivers stable performance, uses high-quality electrolytic capacitors, and its semi-modular design makes installation especially easy. With up to 85% efficiency at half load , it carries the 80 PLUS Bronze certification.

550 W of Reliable Power: Ideal for entry-level gaming PCs
80 PLUS Bronze: 85% efficiency at 50% load
Semi-modular Design: Core cables fixed, optional cables modular
Clean Cable Management: Integrated Velcro straps on three sides
Modern Standard: ATX 3.1 compliant
Quiet Cooling: 135mm HDB fan

Reliable Power Delivery

High-quality electrolytic capacitors ensure consistent and stable performance – even at temperatures up to 40 °C . The result is high efficiency, certified with 80 PLUS Bronze (85% at 50% load).

Modern Semi-Modular Power Supply

Installation is straightforward: Essential cables such as the 24-pin ATX for the motherboard and CPU-EPS are permanently attached. A PCIe 6+2-pin powers your graphics card. SATA and peripheral cables can be added as needed via modular connectors – so you only use the cables you really need.

For better organisation, integrated Velcro straps on three sides of the PSU help you bundle excess cables – reducing clutter and improving airflow inside your case.

Modern Standard: ATX 3.1

The RB Series 550W meets the ATX 3.1 standard , ensuring modern protection and efficiency requirements as well as stable load performance – a solid, future-proof foundation for your PC.

Quiet & Efficient Cooling

135mm HDB fan (larger than standard 120mm)
More airflow at lower RPM
33.2 dB(A) at 1,300 RPM
Consistent temperatures even under load

The larger fan moves more air at lower speeds, keeping the PSU cool and pleasantly quiet – even during extended gaming sessions.

Specification

Colour
Primary Colour	Black
Dimensions
Length / Depth	150 mm
Width	150 mm
Height	86 mm
Fan Specifications
Fan Size	135 mm
Power Supply
PSU Format	ATX
ATX Standard	ATX 3.1
12V Distribution	multi rail
Modular Power Supply	Yes
Modular Type	semi modular
Power Specifications
Total Power Output	550 W
Power Output +3.3V & +5V (combined)	100 W
Power Output +12V rails	549.6 W
Cable Specifications
Max. CPU Power Cable Length	650 mm
Max. 24-Pin Motherboard Power Cable Length	600 mm
Max. 12V-2x6 Cable Length	600 mm
Max. PCIe Power Cable Length	100 mm
Cooling
Semi Passive Power Supply	Yes
Internal Ports
10-Pin ATX12VO Connectors	0
6-Pin ATX12VO Connectors	0
CPU Power Connectors 12V ATX/EPS	2
8 Pin PCIe Power Connectors	2
6+2 Pin PCIe Power Connectors	0
SATA Power Connectors	3
Efficiency Class
80PLUS Efficiency	80 PLUS Bronze
Lighting
Lighting / RGB	No

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