Corsair HXi Series HX1200i Fully Modular Ultra-Low Noise Platinum ATX 1200W Power Supply -BLACK

the Corsair HXi Series HX1200i (2025) 1200W ATX Power Supply, a high-end, fully modular power supply designed for demanding PC builds. It features the latest ATX 3.1 certification and is equipped with the updated 12V-2x6 power connectors for modern graphics cards, ensuring top-tier performance, efficiency, and reliability. 

ATX 3.1 and PCIe 5.1 compliance

12V-2x6 Connector: The PSU comes with two native 12V-2x6 cables, featuring the updated and safer connector standard for high-power GPUs like the NVIDIA RTX 40 and 50 series. This design improves upon the older 12VHPWR connector by using longer power pins and shorter sense pins to prevent overheating and power delivery issues from poor connections.

High Power Excursion Support: The ATX 3.1 standard guarantees the PSU can handle transient power spikes of up to 200% of its rated power for 100 microseconds, providing exceptional stability for high-performance GPUs.

Modern Standby Support: It supports Modern Standby sleep mode, allowing for faster wake-from-sleep times and improved low-load efficiency. 

Electrical performance and efficiency

80 PLUS Platinum Certified: The HX1200i is certified for 80 PLUS Platinum and Cybenetics Platinum efficiency, meaning it converts a minimum of 92% of AC power into usable DC power at half load. This reduces wasted energy as heat, lowering operating costs and ensuring cooler running temperatures.

100% Japanese Capacitors: It is built with 100% industrial-grade, 105°C-rated Japanese electrolytic capacitors, which are highly reliable and durable.

Fully Digital Platform: The PSU features a fully digital design that delivers consistent, clean power while minimizing coil whine and electronic noise.

Resonant LLC Topology with DC-to-DC Conversion: This advanced topology delivers tight voltage regulation, ensuring stable and clean power to all components. 

Cooling and noise

Zero RPM Fan Mode: At low to medium loads, the 140mm fluid dynamic bearing (FDB) fan switches off completely for near-silent operation.

Fluid Dynamic Bearing (FDB) Fan: The FDB fan delivers extremely quiet and long-lasting cooling performance when it needs to spin up.

Server-Grade Components: Engineered to meet maximum power output even at high temperatures, with a rating for continuous output at up to 50°C. 

iCUE software integration and modularity

iCUE Software Control: Connecting the PSU to a motherboard USB header lets you monitor its performance, track power usage, and adjust settings through Corsair's iCUE software.

Single/Multi-Rail Mode: Via iCUE, you can toggle between single and multi-rail overcurrent protection (OCP) on the +12V rail, giving you flexible power delivery options.

Fully Modular Cabling: The unit is fully modular with low-profile, debossed Type 4 cables that reduce clutter and improve airflow within the case. 

Included connectors

ATX: 1x 24-Pin ATX

EPS/ATX12V: 2x 8-Pin (4+4) EPS

PCIe 5.1: 2x 12V-2x6 (native 600W PCIe 5.1)

PCIe 8-Pin: 5x 8-Pin (6+2) PCIe

SATA: 8x SATA (across two cables)

PATA: 6x PATA (across two cables)

iCUE: 1x USB Type-C to 10-1-Pin (for iCUE monitoring)