Power Supply LIAN-LI SX black SX1200P-B 80 Plus Platinum 1200W

Lian-Li SX 1200W Platinum Black Power Supply

Lian-Li's SX Platinum line targets builders who want stability without compromise. The 1200W model in a black finish combines Platinum certification, full support for the latest standards and especially quiet operation, aimed at high-performance systems that need a large, dependable power supply.

Power & efficiency

The unit delivers 1200 watts and carries both 80 PLUS Platinum and PPLP Platinum certifications, ensuring efficient power conversion and less wasted energy. The +12V rail stays steady even under heavy loads, and the ability to absorb power excursions of up to 200% of rated output gives solid headroom for demanding gaming and workstation systems.

Cables & connectors

The fully modular design lets you connect only the cables you need, keeping the build tidy, efficient and ready to show off. Compatibility with the ATX 3.1 and PCIe 5.1 standards ensures a match with current graphics cards and processors, and clean cable routing benefits both the internal look and airflow through the case.

Reliability & cooling

A Smart Stop/Start mechanism keeps the fan motionless as long as the load stays at 40% or below, for complete silence at low loads, and it can be switched on or off via a dedicated toggle on the rear of the unit. High durability comes from quality Japanese capacitors, while a comprehensive protection system covering OCP, OVP, OTP, OPP, SCP, UVP, NLP and SIP guards against over-current, over-voltage, overheating, overload and short circuits.

• Output: 1200W
• Efficiency: 80 PLUS Platinum · PPLP Platinum
• Standard: ATX 3.1 · PCIe 5.1 · power excursions up to 200%
• Modularity: fully modular
• Cooling: Smart Stop/Start · fanless up to 40% load
• Capacitors: quality Japanese
• Protections: OCP · OVP · OTP · OPP · SCP · UVP · NLP · SIP