LIAN LI launches the RB Series PSU, available in 550W, 650W, and 750W models with 80 PLUS® Bronze certification for up to 85% efficiency. Designed to deliver clean power and cleaner builds, the RB Series features an integrated cable management system with a built-in groove and Velcro straps to secure excess cables, paired with a semi-modular layout that lets users connect SATA and peripheral cables only when needed. Fully compliant with Intel’s ATX 3.1 specification, the 650W and 750W units also include a native PCIe Gen 5.1 12V-2x6 connector (up to 450W) for next-gen GPU support. With a high amperage single +12V rail and a DC-to-DC conversion design for enhanced voltage stability and power quality, the RB Series is engineered for reliable performance. Cooling is handled by a quiet 135mm FDB fan, ensuring efficient airflow while keeping noise levels in check.

Advanced Cable Management with Semi-Modular Flexibility
​The RB Series stands out in the Bronze category with a unique cable management system built directly into the PSU housing. The integrated cable groove on one side and Velcro straps on three sides of the PSU allow users to secure excess cables neatly along the sides, reducing clutter and improving airflow. Along with this is a semi-modular design, where only the essential power cables are fixed. Users can connect SATA and peripheral cables as needed. This setup makes the build process easier while giving the flexibility to create a clean, efficient system without extra wiring.

Modern Power Delivery for Next-Gen Hardware
​Fully compliant with the Intel ATX 3.1 standard, the RB Series ensures compatibility with today’s and tomorrow’s systems. The 650W and 750W models feature a native PCIe Gen 5.1 12V-2x6 (12+4-pin) connector, capable of delivering up to 450W. Additionally, the 750W PSU model includes an extra 12V-2x6 to PCIe 6+2-pin cable, providing reliable support for multiple devices beyond just GPUs. This cable is also well-suited for powering high-end AMD graphics cards, which need three PCIe 6+2-pin. Inside, a high-amperage single +12V rail supplies steady power for demanding components, while a DC-to-DC conversion design enhances voltage regulation, power efficiency, and noise reduction. These features work together to ensure reliable performance and clean power under various load conditions.

Quiet Cooling and Certified Efficiency
​To keep noise levels low without sacrificing thermal performance, the RB Series features a 135mm fluid dynamic bearing (FDB) fan. Operating at just 33.2 dBA to 40.1 dBA, depending on the model, the fan delivers quiet performance even under full load. Each unit is 80 PLUS® Bronze certified for up to 85% efficiency, reducing wasted power and heat output. With support for continuous full-load operation at ambient temperatures up to 40°C, along with built-in protections (OPP, OVP, SCP, OCP, UVP, and OTP), the RB Series offers both reliable performance and peace of mind.

Availability
​The LIAN LI RB Series PSUs are available in black only starting October 17th, 2025.

MSRP
RB 550W $49.99
RB 650W $59.99
RB 750W $69.99

For more information on the LIAN LI RB Series PSUs, please visit: https://lian-li.com/product/rb-psu/

The RB Series PSUs are available at Newegg (9:00 AM EST):
550W: https://www.newegg.com/p/pl?d=9SIAFSTKJ90637​
650W: https://www.newegg.com/p/pl?d=9SIAFSTKJ90639​
750W: https://www.newegg.com/p/pl?d=9SIAFSTKJ90638​

​The RB Series PSUs are available at Amazon (9:00 AM EST):
550W: https://www.amazon.com/dp/B0FH6NV36R​
650W: https://www.amazon.com/dp/B0FH6NFHTD​
750W: https://www.amazon.com/dp/B0FH6ML7M6

The RB Series PSUs are available at Caseking (3:00 PM CEST):
550W: https://www.caseking.de/NELI-036.html
​650W: https://www.caseking.de/NELI-038.html
​750W: https://www.caseking.de/NELI-037.html

The RB Series PSUs are available at Overclockers UK (2:00 PM BST):
​https://www.overclockers.co.uk/brands/lian-li?sort=new_label_desc

The RB Series PSUs are available at SCAN (2:00 PM BST):
550W: https://www.scan.co.uk/products/550w-lian-li-rb-550b-fully-wired-80plus-...
​650W: https://www.scan.co.uk/products/650w-lian-li-rb-650b-fully-wired-80plus-...
​750W: https://www.scan.co.uk/products/750w-lian-li-rb-750b-fully-wired-80plus-...