Corsair SF850 80 PLUS Platinum Fully Modular 850W SFX Power Supply (Black)

The Corsair SF850 is an 850W SFX-form-factor power supply built for enthusiasts who demand full-featured performance in the tightest of chassis. Despite its compact dimensions, the SF850 carries 80 PLUS Platinum efficiency certification, meaning it converts mains power to DC with high efficiency across light, typical, and heavy loads — keeping heat and electricity costs in check even during extended gaming sessions or sustained creative workloads. Corsair formally certifies the SF850 to the ATX 3.1 standard, which sets strict requirements around transient-load handling and power-rail stability. Paired with a PCIe 5.1-compliant 12V-2x6 GPU cable included in the box, the SF850 is ready for modern discrete graphics cards without adapters or afterthought dongles. Cable management is simplified by a fully modular design using Type-5 Micro-Fit connectors. You attach only the cables your build actually needs, reducing clutter inside already-space-conscious SFF enclosures. Four PCIe 6+2 pin connectors and four 4-pin peripheral connectors are available, giving you flexibility across a range of component configurations. Thermal management comes via a 92 mm fluid-dynamic-bearing fan controlled by PWM. At low-to-medium loads the unit enters Zero RPM mode, spinning the fan down entirely so your workspace stays silent during everyday tasks. Under heavier loads the fan spins up smoothly and quietly to maintain safe operating temperatures. Corsair rates the SF850 for continuous operation at up to 50 °C ambient — a meaningful specification for dense small-form-factor cases where airflow is limited and internal temperatures run higher than in full-tower builds. Component longevity is underpinned by 100% Japanese electrolytic capacitors rated to 105 °C, selected for industrial-grade durability rather than cost-cutting consumer-grade alternatives. Corsair backs the SF850 with a 7-year warranty, reflecting confidence in the unit's long-term reliability. --- Verified Specifications --- Model: Corsair SF850 (CP-9020256-IN) Wattage: 850 W Series: SF Series Form Factor: SFX Efficiency Rating: 80 PLUS Platinum Standard Compliance: ATX 3.1 certified GPU Connector Standard: PCIe 5.1 (12V-2x6 cable included) Modularity: Fully modular (Type-5 Micro-Fit connectors) Cooling: 92 mm PWM fluid-dynamic-bearing fan, Zero RPM mode Continuous Operating Temperature: 50 °C Capacitors: 100% Japanese electrolytic, 105 °C-rated PCIe Connectors (6+2): 4 Peripheral (4-pin) Connectors: 4 Warranty: 7 years Colour: Black SKU: CP-9020256-IN