CORSAIR HX1200i ATX 3.1 Platinum 1200 Watt Fully Modular SMPS

The CORSAIR HX1200i is a 1200-watt fully modular power supply built for demanding, high-end PC builds. Part of the HXi Series, it carries formal ATX 3.1 certification and PCIe 5.1 compatibility, making it a strong match for current-generation, power-hungry graphics cards including the latest 50-series GPUs. Two 12V-2x6 GPU power cables ship in the box, each featuring dual-colour connectors that provide visual confirmation of a fully seated, secure connection — an important safety cue for high-current GPU power delivery. Efficiency is rated at Cybenetics Platinum level, meaning the unit delivers steady power at up to 90% efficiency under typical loads, reducing wasted heat, lowering electricity draw, and keeping overall system temperatures down. The fully modular cable design means only the cables your build actually needs are installed, improving internal airflow and simplifying cable management. Cooling is handled by a fluid dynamic bearing fan, a bearing type chosen for low noise and long service life. Zero RPM mode takes this a step further: at low-to-medium loads the fan stops entirely, making the PSU completely silent. Under heavier loads the fan spins up smoothly and quietly. Every capacitor inside the unit is an industrial-grade electrolytic type sourced from Japanese manufacturers and rated to 105 °C, a specification associated with greater tolerance for heat stress and longer operational life than standard 85 °C capacitors. CORSAIR iCUE software integration allows real-time monitoring of PSU performance metrics from the desktop, along with the ability to toggle between single-rail and multi-rail 12V modes and manually adjust fan speed — useful for builders who want granular control over acoustics or power delivery behaviour. The HX1200i ships with a 10-year warranty. Verified Specifications: - Model / SKU: HX1200i / CP-9020307-IN - Wattage: 1200 W - 80 PLUS / Cybenetics Rating: 80 Plus Platinum / Cybenetics Platinum - ATX Standard: ATX 3.1 certified - GPU Power: PCIe 5.1 compatible; 2 × 12V-2x6 cables included - PCIe (6+2-pin) Connectors: 5 - SATA Connectors: 8 - Modular: Fully modular - Capacitors: 100% Japanese electrolytic, 105 °C rated - Fan Bearing: Fluid dynamic bearing with Zero RPM mode - Software: CORSAIR iCUE compatible - Warranty: 10 years - Series: HXi