Corsair HX1000i ATX 3.1 Platinum 1000 Watt Fully Modular SMPS

The Corsair HX1000i is a 1000-watt fully modular power supply built on the HXi Series platform, designed for enthusiast and workstation PC builds that demand reliable, efficient, and quiet power delivery. Carrying 80 Plus Platinum certification, it delivers up to 92% efficiency under typical load conditions, helping reduce heat output, lower electricity consumption, and maintain stable voltages for demanding components. The HX1000i is formally ATX 3.1 certified and ships with a PCIe 5.1 12V-2x6 GPU cable, making it directly compatible with NVIDIA GeForce RTX 40-series graphics cards and their transient power requirements. Three EPS12V connectors ensure broad compatibility with high-end processors including AMD Ryzen 7000-series platforms. Because the cabling is fully modular, builders can connect only the cables their system requires, improving airflow and simplifying cable management inside the chassis. Cooling is handled by a 140mm fluid dynamic bearing fan paired with Zero RPM mode. At low and medium loads the fan stops entirely, resulting in near-silent operation. The fan only spins when thermal conditions require it, and the fluid dynamic bearing is engineered for long service life compared to sleeve-bearing alternatives. Internally, the HX1000i uses 100% Japanese primary electrolytic capacitors rated to 105°C, a specification associated with extended operational lifespan and stable output under thermal stress. As a fully digital power supply it supports Modern Standby sleep mode for fast system wake times and low idle power draw. CORSAIR iCUE software integration allows real-time power monitoring, fan speed control, and switching between single-rail and multi-rail +12V modes directly from the Windows desktop. Verified Specifications: - Model: HX1000i | SKU: CP-9020259-IN (ATX 3.1) - Wattage: 1000W - Efficiency Rating: 80 Plus Platinum (up to 92%) - ATX Standard: ATX 3.1 certified - GPU Connector: PCIe 5.1 12V-2x6 cable included - Modular: Fully Modular - Fan: 140mm Fluid Dynamic Bearing, Zero RPM mode - Capacitors: 100% Japanese, 105°C-rated primary electrolytics - EPS12V Connectors: 3 - PCIe (6+2) Connectors: 5 - SATA Connectors: 8 - Warranty: 10 Years - Series: HXi Series For builders pairing this unit with a high-core-count processor and an RTX 40-series GPU, the 1000W headroom and ATX 3.1 transient handling make the HX1000i a technically grounded choice. Pair it with compatible Corsair RAM or a Corsair 4000-series case for a cohesive, iCUE-managed system