Lian Li SX Series 80 PLUS Platinum...

Powerful 1,200-watt power supply, with 80 PLUS Platinum efficiency, ATX 3.1 & PCIe 5.1 support, zero-RPM fan mode, modular

The Lian Li SX Series 1,200 W power supply is perfect for anyone looking to build a powerful gaming PC or workstation. Delivering up to 1,200 watts, it provides enough power for high-end processors, modern graphics cards, and extensive cooling systems. Thanks to the 120 mm fan with Zero RPM mode , the power supply remains quiet when your system is under low load. The fully modular design also ensures a tidy interior – you only connect the cables you really need.

1,200 watts output: Ideal for high-end PCs with powerful hardware
80 PLUS Platinum efficiency: Up to 92% efficiency at half load
Fully modular design: Includes flexible, sleeved cables
ATX 3.1 & PCIe 5.1 standard: Future-proof and GPU compatible
Quiet operation: 120 mm fan with Zero RPM mode

Lian Li SX Platinum: Maximum performance for modern hardware

The Lian Li SX Series 1,200 W reliably powers even high-end components. It supports current AMD and Intel processors as well as large graphics cards like the RTX 5000 series. Thanks to ATX 3.1 and PCIe 5.1 compatibility , it is also well prepared for upcoming hardware generations. The power supply also offers a native 12V 2x6 connector for modern GPUs – without the need for adapters.

High efficiency & quiet operation

Inside, high-quality Japanese capacitors ensure stable power delivery and a long service life. With an efficiency of up to 92% , the power supply operates very energy efficiently. The 120 mm FDB fan runs at up to 2,000 RPM under heavy load to maintain cool temperatures. At low load, it automatically switches to Zero RPM mode for completely silent operation.

Clean cable management thanks to modular design

The Lian Li SX Series offers fully modular connectors . You only connect the cables you really need – keeping your system tidy and airflow unobstructed. The included braided cables are flexible and easy to route. The 12V 2x6 connector features a two-colour marking that indicates when the connection is securely locked. This gives you the assurance that the plug is correctly seated.

Safe & durable

For maximum safety, the power supply protects your system with multiple protection features such as overvoltage, overload, short circuit, and no-load protection. This keeps your hardware safe in the long term.

Specification

Colour
Primary Colour	Black
Dimensions
Length / Depth	140 mm
Width	86 mm
Height	150 mm
Fan Specifications
Fan Size	120 mm
Power Supply
PSU Format	ATX
ATX Standard	ATX 3.1
12V Distribution	single rail
Modular Power Supply	Yes
Modular Type	fully modular
Protection Circuits	OCP (Overcurrent Protection), OPP (Overload Protection), OTP (Overtemperature Protection), OVP (Overvoltage and Undervoltage Protection), SCP (Short-Circuit Protection), UVP (Undervoltage Protection)
Power Specifications
Total Power Output	1200 W
Power Output +3.3V & +5V (combined)	100 W
Power Output +12V rails	1200 W
Cable Specifications
Max. CPU Power Cable Length	700 mm
Max. 24-Pin Motherboard Power Cable Length	600 mm
Max. 12V-2x6 Cable Length	600 mm
Max. PCIe Power Cable Length	550 mm
Max. SATA Power Cable Length	850 mm
Cooling
Semi Passive Power Supply	Yes
Internal Ports
CPU Power Connectors 12V ATX/EPS	2
CPU Power Supply	2x 4+4-Pin
12V-2x6 Power Connectors	1
6+2 Pin PCIe Power Connectors	5
SATA Power Connectors	8
Efficiency Class
80PLUS Efficiency	80 PLUS Platinum
Lighting
Lighting / RGB	No

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