Power supply unit Lian Li RS1200G 1200 W 20+4 pin ATX 80 PLUS Gold White

The Lian Li RS1200G is a 1200 W ATX power supply designed for desktop PCs, offering modular cabling and a compact 150 × 86 × 150 mm form factor in white. It supports 100–240 V AC input at 50/60 Hz and includes a 20+4 pin ATX motherboard connector. Built to Gold certification standards and tested by Cybenetics to Platinum-level real-world efficiency, the RS1200G combines high efficiency with industrial-grade components and flexible installation features for varied case layouts.

Advantages

The RS1200G provides high efficiency (80 PLUS Gold with Cybenetics Platinum-level performance), a rotatable 90° AC inlet and dual installation options to fit standard or vertical PSU placements. German EPCOS capacitors ensure long-term stability, while a compact size with a 135 mm low-noise fan offers effective cooling and compatibility with dual-chamber cases. The unit includes a dedicated RS Hub, dual USB cables, braided-textured 20+4 main cable with cable comb, a dual-color 12V-2×6 cable for next-gen GPUs, and an insulated dust cover for the 18+10 pin output. A 10-year warranty covers the PSU and a 2-year warranty covers the RS Hub.

Suitable for

• High-performance gaming PCs with modern GPUs
• Workstations and content-creation systems requiring reliable 1200 W power
• Small or side-mounted PSU builds needing compact ATX dimensions
• Custom builds that benefit from cleaner cable routing and modular cabling

Key specifications

• Total power: 1200 W
• AC input: 100–240 V, 50/60 Hz
• Motherboard connector: 20+4 pin ATX (dual-sided routing capable)
• 80 PLUS certification: 80 PLUS Gold (Cybenetics Platinum-level efficiency)
• Fan: 135 mm, 0–2400 RPM
• Form factor dimensions: 150 × 86 × 150 mm (ATX)
• Native 12V-2×6 high-current terminals for GPU power
• Colour: White

How to use

Install the RS1200G according to your case layout, choosing the standard or side installation orientation. If required, rotate the AC inlet by 90° to align with your case wiring. Connect the 20+4 pin motherboard cable (which supports dual-sided routing) and attach modular cables for CPU, PCIe, SATA and peripheral devices as needed. Use the included RS Hub and USB cables if you prefer PSU-provided USB connectivity. Secure cables with the provided cable comb and magnetic clips to manage excess length and maintain airflow.

Recommendations

For optimal cooling and noise performance, ensure unobstructed airflow to the 135 mm fan and route cables to avoid blocking intake or exhaust paths. Use the dual-color 12V-2×6 cable for compatible GPUs to simplify connections, and keep the insulating dust cover on the 18+10 pin output when not in use to prevent foreign object ingress.