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Lian Li RB 550W (Black)
ATX 3.1 550W Power Supply - 80PLUS Bronze
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80PLUS Bronze ATX 3.1 Power Supply by Lian Li
Dressed in elegant, classic black, Lian Li's RB series offers enough power to suit everything from everyday PCs to high-performance systems. With a compact depth of 150 mm, the RB series fits easily into most ATX cases, making it an excellent choice for space-conscious or minimalist builds without compromising on power. Fully compliant with the latest ATX 3.1 standard, this power supply supports next-generation hardware requirements with its native PCIe 12V-2×6 connectors for enhanced safety and power delivery. Designed to handle high transient loads with increased efficiency, it is ready for the most demanding GPUs and future upgrades. The RB series features a built-in deep routing channel and Velcro strips on three sides of the power supply case to keep cables in place. Excess cables can be easily stowed away, while thick CPU and GPU power cables remain neatly organised. This improves airflow, reduces clutter and allows for a cleaner, more professional setup.
Highlights
- ATX 3.1 compliant
- Compact 150 mm ATX size for wide case compatibility.
- 80 PLUS Bronze certified with up to 85% efficiency for everyday systems.
- ATX 3.1 compatible with native 12V-2×6 connector for support of next-generation GPUs.
- Integrated cable routing channel with Velcro straps for neat management.
- Three-sided cable outlets designed for motherboards with rear connectors.
- 135mm HYB intelligent temperature-controlled fan for quiet cooling.
- Includes a complete set of cables for CPU, GPU, SATA, and PATA connections.
Select your criteria
General information |
Product name |
Lian Li RB 550W (Black) |
Brand |
Lian Li | |
Model |
G9P.RB0550B.B000.EU | |
Power and Efficiency |
Power |
550 W |
80 PLUS certification |
Yes | |
80 PLUS / Cybenetics certification |
80 PLUS Bronze | |
Connectivity |
Modular |
No |
Modularity |
Non-modular | |
Power connector(s) |
2 X +12V (Power supply P8 - 2 x P4) | |
| 3 X Serial ATA power supply | ||
| 1 X ATX 20 + 4 Pin | ||
| 1 X Molex (4 Pin) Female | ||
| 2 X PCI Express 6 + 2 Pin | ||
Configurator |
PSU-CM compatibility |
+12V P4 |
| +12V P8 | ||
| +12V P4 and +12V P4 | ||
| +12V P8 and +12V P4 | ||
| +12V P8 and +12V P8 | ||
Cooling |
Fan size |
135mm |
Silent |
Yes | |
Power supply type (PC) |
Active | |
Design |
Power format |
ATX/EPS |
Power supply standard |
ATX12V | |
| EPS12V | ||
ATX 3.0 |
Yes | |
ATX 3.1 |
Yes | |
Multi-GPU |
None | |
Typical use |
Desktop computer | |
Physical characteristics |
Color |
Black |
LED RGB |
No | |
Height |
86 mm | |
Width |
150 mm | |
Length |
150 mm | |
Warranties |
Commercial warranty |
Seller 2 years
|
Legal warranty |
See terms & conditions
|
See all Lian Li products
Product referenced on 30 Dec 2025
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