Corsair SF1000 Platinum ATX 3.1 Fully Modular SFX SMPS

The Corsair SF1000 is a 1000-watt SFX-form-factor power supply carrying an 80 PLUS Platinum efficiency rating, designed specifically for high-performance small-form-factor PC builds where space is at a premium but power demands are uncompromising. Despite its compact SFX dimensions, it delivers a single +12V rail that can sustain the full rated output, making it suitable for demanding GPU and CPU combinations inside mini-ITX and SFF chassis. The unit is formally certified for the ATX 3.1 standard and ships with a PCIe 5.1 12V-2x6 connector cable, providing native compatibility with modern graphics cards such as those in the NVIDIA GeForce RTX 40 Series. Four PCIe 6+2 connectors and four SATA connectors are available, keeping cabling options flexible even within space-constrained enclosures. Cooling is handled by a 92 mm fluid dynamic bearing PWM fan, which operates in a Zero RPM mode at low to medium loads — the fan stops spinning entirely, eliminating fan noise until thermals demand active cooling. This makes the SF1000 particularly well-suited to home-theatre PC and near-silent workstation builds that happen to require high wattage headroom. Internally, the unit is built with 105 °C-rated Japanese electrolytic capacitors throughout, a specification that points to long-term reliability under sustained thermal stress. Corsair rates continuous output at up to 50 °C ambient, which is meaningful for users placing the PSU inside thermally constrained cases. The fully modular Type-5 Micro-Fit cable system means only the cables required for a given build need to be installed, reducing clutter and improving airflow inside already tight enclosures. Verified specifications: Wattage — 1000 W; Form factor — SFX; Efficiency — 80 PLUS Platinum; Modular — Fully modular (Type-5 Micro-Fit connectors); ATX standard — ATX 3.1 certified; PCIe connector support — PCIe 5.1 12V-2x6; PCIe 6+2 connectors — 4; SATA connectors — 4; Fan — 92 mm PWM fluid dynamic bearing with Zero RPM mode; Capacitor rating — 105 °C Japanese electrolytic; Continuous operating temperature — 50 °C; Warranty — 7 years; SKU / Part number — CP-9020257-IN; GTIN — 840006663379; Colour — Black