This article covers Lian Li RS1200G 1200W ATX 電源 USB ファンハブ付き.

Overview

The Lian Li RS1200G is a 1200W fully modular ATX power supply that brings several unique innovations to the table. Its most distinctive feature is the industry-first rotatable AC inlet, allowing you to orient the power cable either straight out the back or at a 90-degree angle to the side. This dramatically improves cable management in tight cases. Additionally, it integrates a USB 2.0 hub directly into the PSU, giving you two extra USB ports without needing an internal header splitter. Despite its 80 PLUS Gold certification, the RS1200G achieves Cybenetics Platinum-level efficiency, meaning it stays above 90% under typical loads. It fully supports ATX 3.1 and PCIe 5.1 standards, including the safer 12V-2x6 connector for next-gen graphics cards. With a 10-year warranty and comprehensive protections (OCP, OVP, OTP), this is a long-term investment for high-end builds. Positioned firmly in the enthusiast tier, the RS1200G competes with other premium 1200W units but stands out with its rotating AC inlet and built-in USB hub. It's ideal for those building a flagship gaming rig or a multi-GPU workstation.

Compatibility Guide

The RS1200G follows the standard ATX form factor (150 x 140 x 86 mm approximate, though exact dimensions not confirmed) and fits most ATX cases. The rotatable AC inlet may require a bit of clearance on the side if you choose the 90-degree orientation, so check your case's PSU shroud area. Connector-wise, it includes a 24-pin ATX, two 8-pin EPS12V (CPU), and a dedicated 12V-2x6 cable for PCIe 5.1 GPUs. It also provides multiple SATA and PATA (Molex) connectors via soft flat cables. The built-in USB 2.0 hub draws power from a SATA power cable and connects to a motherboard USB 2.0 header, adding two USB 2.0 ports on the PSU itself.

Product Info

Released in 2025, the Lian Li RS1200G is a high-end power supply targeting enthusiasts. It carries an 80 PLUS Gold certification with Cybenetics Platinum-level real-world efficiency. The unit is fully modular, uses a 120mm fan (likely, though not specified), and comes with a 10-year warranty. The rotating AC inlet is a patented design that allows both rear and side cable routing. The USB hub is compatible with Lian Li's EDGE GOLD PSU series as well. Pricing sits around ¥27,000 in Japan (), which is competitive for a 1200W unit with these features.

Best Use Cases

High-end gaming: Perfect for systems with an RTX 4090 or 5090, where transient power spikes can exceed 600W. The 1200W capacity and 12V-2x6 connector ensure stable operation. Not recommended for mid-range builds (RTX 4070 or below) where a 750W unit would suffice. Creative workstations: If you run multiple GPUs for rendering or AI workloads, the RS1200G provides ample headroom. The USB hub is handy for connecting dongles or low-speed peripherals without reaching the back of the case. * Cable-management enthusiasts: The rotatable AC inlet and soft flat cables make for a clean build. The magnetic cable ties help keep everything tidy. However, if you prioritize absolute silence, consider a unit with a larger fan or a fanless mode.

Things to Consider

First, 1200W is overkill for most users. A typical single-GPU gaming PC rarely draws more than 600W under load. Only opt for this if you plan to use a top-tier GPU (RTX 4090/5090) or multiple GPUs. Second, the built-in USB hub is USB 2.0 only (480 Mbps). It's fine for mice, keyboards, or USB audio, but not for high-speed storage or VR headsets. You'll still need motherboard USB 3.0/3.1 ports for those. Third, the rotating AC inlet is a clever feature, but it adds a slight protrusion on the side when used in 90° mode. Make sure your case has enough clearance between the PSU and the side panel. ## FAQ
Q: Does this PSU support the new 12V-2x6 connector? Is it safe? A: Yes, it includes a 12V-2x6 cable with a dual-color housing that makes it easy to verify full insertion. The 12V-2x6 standard is an improvement over 12VHPWR, with shorter sense pins to prevent overheating if not fully seated. Q: Can I use the USB hub without connecting the SATA power cable? A: No, the USB hub requires power from a SATA power connector. The hub itself connects to a motherboard USB 2.0 header for data. Without the SATA power, the hub won't function. Q: How does the rotatable AC inlet work exactly? A: The AC inlet module can be rotated 90 degrees. In the default position, the power cable exits straight out the back. By rotating it, the cable exits from the side of the PSU, which can help in cases where the rear outlet is blocked or for cleaner routing. The rotation is tool-free and can be done before installation.

Product Disclosure (Amazon)

  • Manufacturer: Lian Li
  • Seller: Amazon US
  • Fulfilled by: Amazon US
  • ASIN: B0FGPPM12Q
  • Note: This article covers a manufacturer-made product based on Amazon listing details.