Corsair RM850x Gold ATX 3.1 Fully Modular SMPS

The Corsair RM850x (CP-9020270-IN) is a fully modular, 850-watt power supply from the Corsair RMx Series, designed to deliver stable, efficient power to modern high-performance desktop PCs. Certified to the Cybenetics Gold efficiency standard and fully ATX 3.1 compliant, this PSU is engineered to support the latest CPU sleep and hibernate power states as well as the transient power demands of current-generation GPUs, including NVIDIA GeForce RTX 40 Series cards. A native 12V-2x6 GPU cable is included out of the box, eliminating the need for adaptors when pairing with compatible graphics cards. Power delivery remains reliable even under sustained thermal stress, thanks to a rated continuous operating temperature of 50°C. Internal longevity is reinforced by 100% industrial-grade Japanese electrolytic capacitors rated at 105°C, which help maintain consistent performance across the product's lifetime. The single +12V rail topology simplifies load distribution for builders seeking predictable power delivery. Cable management is straightforward with a fully modular connector layout using Type-4 connectors and sleek embossed cables with low-profile combs. Only the cables required for a specific build need to be connected, reducing clutter inside the case and improving airflow. The RM850x ships with 12 SATA connectors and 4 PCIe (6+2-pin) connectors, covering the needs of most mainstream and enthusiast configurations. Acoustic performance is a core strength of this model. The 140mm fluid dynamic bearing fan with magnetic dome structure operates in Zero RPM mode during low-to-medium loads, producing no fan noise at all. When additional airflow is required, a manual fan override knob allows users to increase fan speed independently of the automatic profile, providing flexibility in thermally constrained cases. The RM850x carries a 10-year warranty and is designed for builders who want a quiet, modular, ATX 3.1-ready foundation for their system. — Verified Specifications — Model: CP-9020270-IN | Series: RMx | Wattage: 850 W | Efficiency: Cybenetics Gold / 80 Plus Gold | ATX Standard: ATX 3.1 | PCIe: PCIe 5.1 (12V-2x6 native cable included) | Modular: Fully Modular (Type-4) | Fan: 140mm Fluid Dynamic Bearing, Zero RPM mode | Operating Temp: 50°C continuous | Capacitors: 105°C-rated Japanese electrolytic | SATA Connectors: 12 | PCIe (6+2) Connectors: 4 | Color: Black | GTIN: 840006667544 | Warranty: 10 Years