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

**URL:** https://aio.lv/en/product--lian-li-g9prs1200gwh00eu--11671190
**Data updated:** 2026-01-04 16:04 (EET)
**Category:** Power Supplies (PSU)
**Manufacturer:** lian li
**Manufacturer code:** G9P.RS1200G.WH00.EU
**EAN:** 4718466018762
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 148.49 €
**Prices and availability valid until:** 2026-08-11 23:59
**Price without VAT (21%):** 122.72 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--lian-li-g9prs1200gwh00eu--11671190

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 10.08.2026 | free |
| Pickup points | 13.08.2026 | 1.89 EUR |
| Courier delivery to door | 13.08.2026 | 4.99 EUR |

## Summary description

ATX power supply unit Lian Li RS1200G delivers 1200 W of continuous power with 20+4 pin ATX motherboard connector and 80 PLUS Gold efficiency. Designed for desktop PCs, it features a 135 mm fan, single-fan cooling, compact ATX dimensions (86 × 150 × 150 mm) and white finish. Includes AC input 100–240 V, 50/60 Hz and long power cables for flexible installation.

## Long description

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.
Usage 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.

## Specifications

### Power

| Feature | Value |
|---|---|
| Total power | 1200 W |
| Power Factor Correction (PFC) type | Active |
| Power protection features | Under voltage, Under temperature, Surge & inrush protection (SIP), Short circuit, Over voltage, Over power, Over current, No load operation |
| Combined power (+3.3V) | 100 W |
| Combined power (+12V) | 1200 W |
| Combined power (+5V) | 100 W |
| Combined power (+5Vsb) | 100 W |
| Input current | 8 - 15 |
| AC input frequency | 50/60 |
| AC input voltage | 100 - 240 |

### Ports & interfaces

| Feature | Value |
|---|---|
| Motherboard power connector | 20+4 pin ATX |
| Peripheral (Molex) power connectors (4-pin) | 4 |
| ATX power connector (20+4 pin) | Yes |
| PCI Express power connectors (6+2 pin) | 2 |
| Cabling type | Fully-Modular |
| Motherboard power cable length | 620 mm |
| CPU power cable length | 700 mm |
| Peripheral (Molex) power cable length | 500 |
| PCI Express power cable length | 650 mm |

### Performance

| Feature | Value |
|---|---|
| Purpose | PC |
| 80 PLUS certification | 80 PLUS Gold |
| Mean time between failures (MTBF) | 100000 h |
| Noise level | 36.27 dB |
| Bearing technology | FDB |
| ATX version | 3.1 |
| Power supply unit (PSU) form factor | ATX |

### Design

| Feature | Value |
|---|---|
| Fan diameter | 135 mm |
| Number of fans | 1 fan(s) |
| Fan speed | 0 - 2400 |
| Product colour | White |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 150 mm |
| Width | 86 mm |
| Depth | 150 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating temperature (T-T) | 0 - 40 |

## FAQ

### How much does the Lian Li RS1200G 1200W ATX PSU cost, and is it available for purchase?

The price is 148.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 303 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 10.08.2026 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: Cash payment, 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. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: total power, 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 RS1200G 1200W 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.

## Image

https://aio.lv/img/cache/product/11671190/66977201_large.webp