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header-product Power supply unit Lian Li RB0550B.B 550 W, 24-pin ATX, 80 PLUS Bronze, 135 mm fan, black
60.49 €

Power supply unit Lian Li RB0550B.B 550 W, 24-pin ATX, 80 PLUS Bronze, 135 mm fan, black

Lian Li RB0550B.B 550 W ATX PSU Photo 1
Lian Li RB0550B.B 550 W ATX PSU Photo 2
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Lian Li RB0550B.B 550 W ATX PSU Photo 4
Lian Li RB0550B.B 550 W ATX PSU Photo 5
Lian Li RB0550B.B 550 W ATX PSU Photo 6
Lian Li RB0550B.B 550 W ATX PSU Photo 1
Lian Li RB0550B.B 550 W ATX PSU Photo 2
Lian Li RB0550B.B 550 W ATX PSU Photo 3
Lian Li RB0550B.B 550 W ATX PSU Photo 4
Lian Li RB0550B.B 550 W ATX PSU Photo 5
Lian Li RB0550B.B 550 W ATX PSU Photo 6
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Power supply unit Lian Li RB0550B.B 550 W, 24-pin ATX, 80 PLUS Bronze, 135 mm fan, black

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Short description

The Lian Li RB0550B.B is a 550 W ATX power supply designed for desktop PCs. It delivers up to 550 W total power with 85% efficiency and 80 PLUS Bronze certification. Features include a 24‑pin ATX motherboard connector, 60 cm motherboard cable, 65 cm CPU cable, a 135 mm cooling fan and wide AC input (100–240 V, 50/60 Hz). Certified to CE/CB/cTUVus/TÜV/FCC/BSMI/CCC/KCC/SAA+RCM standards. Suitable for mainstream builds requiring reliable, efficient power and active cooling.
Available at price 60.49 €: 50 pcs.
Total available for order: 239 pcs.
Warranty: 2 Years
SKU: 11656774
Manufacturer: lian li
free shipment

Cheapest delivery:

Latvijas Pasts pakomāts

Pick-up points

Latvijas Pasts pakomāts

Cost

1.99 €

Deliver

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
09.07.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
14.07.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 1.00 kg)
Parcel couriers
Latvijas Pasts pakomāts / Unisend LV / DPD Paku skapis / Omniva LV / Venipak Pickup LV / Venipak Locker LV / Latvijas Pasts nodaļa
14.07.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.99 €
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Payment Methods:
Bank transfer, Bank cards on-line, Apple Pay, Google Pay
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Product information

Description

The Lian Li RB0550B.B is a 550 W ATX power supply in classic black, designed for desktop systems that need stable, efficient power. It supports ATX 3.1 and includes a 24‑pin motherboard connector, a 135 mm temperature‑controlled fan, and a wide AC input range for compatibility with global power standards.

Advantages

The RB0550B.B combines compact dimensions with built‑in cable management to simplify PC builds: a 150 mm depth fits most ATX cases while integrated routing channels and Velcro straps on three sides keep CPU, main power and peripheral cables neatly secured. With native 12V‑2×6 support for modern GPUs, high‑quality 105°C capacitors, a robust single +12V rail and DC‑to‑DC architecture, it provides stable output and reduced voltage fluctuations. The 135 mm HYB smart fan provides effective cooling at lower RPMs for quieter operation, and 80 PLUS Bronze certification delivers up to 85% efficiency for everyday energy savings.

Suitable for

  • Mainstream desktop PCs and office systems
  • Compact ATX or minimalist case builds with limited depth
  • Users seeking tidy cable management and improved airflow
  • Systems with midrange GPUs and future GPU upgrades

Key specifications

  • Total power: 550 W
  • Efficiency: up to 85% (80 PLUS Bronze)
  • Form factor depth: 150 mm (compact ATX size)
  • Motherboard connector: 24‑pin ATX
  • CPU connector: 4+4 pin
  • PCIe support: native 12V‑2×6 to 6+2 PCIe (supports up to three 8‑pin GPU connectors on higher wattage models)
  • Fan: 135 mm temperature‑controlled HYB fan (0–1300 RPM)
  • Capacitors: rated 105°C
  • Operating temperature: up to 40°C
  • Protection features: OVP, UVP, OCP, OPP, OTP, SCP
  • AC input: 100–240 V, 50/60 Hz
  • Colour: black

How to use

Install the PSU into a compatible ATX case ensuring the 150 mm depth fits the chassis. Connect the 24‑pin ATX cable to the motherboard, attach the 4+4 CPU connector to the CPU power header, and use the modular SATA and peripheral cables only as needed. Route cables through the built‑in grooved channel and secure them with the Velcro straps on the PSU housing to maintain airflow and a neat interior layout. Verify all connections before powering on the system.

Usage recommendations

For reliable performance, allow adequate case ventilation and avoid operating the PSU above the specified 40°C ambient temperature. Use the modular cables supplied for peripherals to reduce clutter and ensure that GPU power demands do not exceed the unit’s rated 550 W when configuring high‑power components.

Specifications

Total power:
550 W
Efficiency:
85 %
Motherboard power connector:
24-pin ATX
80 PLUS certification:
80 PLUS Bronze
Fan diameter:
135 mm
Product colour:
Black
All features

Power

Total power:
550 W
Efficiency:
85 %
Power Factor Correction (PFC) type:
Active
Power protection features:
Under voltage, Under temperature, Short circuit, Over voltage, Over power, Over current
Combined power (+3.3V):
100 W
Combined power (+12V):
549.6 W
Combined power (+5V):
100 W
Combined power (-12V):
3.6 W
Combined power (+5Vsb):
15 W
Max output current (+3.3V):
20 A
Max output current (+12V):
45.8 A
Max output current (+5V):
20 A
Max output current (-12V):
0.3 A
Max output current (+5Vsb):
3 A
Input current:
10
AC input frequency:
50/60
AC input voltage:
100 - 240

Ports & interfaces

Motherboard power connector:
24-pin ATX
ATX Power connector (24-pin):
Yes
Floppy disk drive connector:
Yes
Floppy drive power connector:
1
Number of SATA power connectors:
8
Peripheral (Molex) power connectors (4-pin):
3
EPS power connector (8-pin):
Yes
CPU power connector (4+4 pin):
Yes
PCI Express power connectors (6+2 pin):
4
Cabling type:
Non-Modular
Number of PATA power connectors:
3
Motherboard power cable length:
600 mm
CPU power cable length:
650 mm
EPS power connector (4+4 pin):
Yes
Number of SATA power cables:
3

Performance

Purpose:
PC
80 PLUS certification:
80 PLUS Bronze
Mean time between failures (MTBF):
100000 h
Noise level: Not only energy saving helps to protect the environment but also noise level reduction. Noise level reduction up to 3 dB really means noise level reduction in 2 times. For example, a device with noise level 39 dB (А) will be two times quieter than a devise with a noise level 42 dB (А). Energy-saving certificate that shows noise level plays the role of an additional objective indicator basing on which You can successfully choose a product.
33.2 dB
ATX version:
3.1
Power supply unit (PSU) form factor:
ATX

Design

Fan diameter:
135 mm
Number of fans:
1 fan(s)
Fan speed:
0 - 1300
Product colour:
Black

Certificates

Certification:
CE/CB/cTUVus/TÜV/FCC/BSMI/CCC/KCC/SAA+RCM

Weight & dimensions

Height:
150 mm
Width:
86 mm
Depth:
150 mm

Description

Machine translation. Load original

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Stock data
Warehouse Stock Delivery to the store Store Price
WH320 50 09.07.2026 Best delivery 60.49 €
WH354 50 16.07.2026 65.99 €
Available only for legal entities
Warehouse Stock Delivery to the store Store Price
WH109 139 23.07.2026 65.99 €
60.49 €
Stock: 50
Delivery Date: 09.07.2026 Best delivery
Warehouse: WH320
65.99 €
Stock: 50
Delivery Date: 16.07.2026
Warehouse: WH354
Available only for legal entities
65.99 €
Stock: 139
Delivery Date: 23.07.2026
Warehouse: WH109

Customer reviews

Customer questions

FAQ

How much does the Lian Li RB0550B.B 550 W ATX PSU cost, and is it available for purchase?

The price is 60.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 239 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 09.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All lian li products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized lian li service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: total power, efficiency, motherboard power connector, 80 plus certification, fan diameter, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

Where can I download the instructions for Lian Li RB0550B.B 550 W ATX PSU?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.
warranty
14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
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