CORSAIR RM850 850W ATX 80 PLUS GOLD Certified Full Modular Power Supply PSU (CP-9020196-NA). It is in excellent, open box condition and includes the accessories in the original box. Power your high-performance workstation or gaming rig with the reliable and efficient Corsair RM 850W power supply. The 80 PLUS GOLD certification means 90% efficiency with lower loads, less noise, and low temperatures. Built with industrial-grade hardware for top-notch performance. Completely modular power supply lets you connect only the cables you need for a neat and tidy interior. 850W power supply with triple EPS12V connectors can supply reliable power to all the latest graphic cards, processors, and other performance hardware. 140mm rifle-bearing fan is fine tuned to keep noise minimum even when running at full load. Zero RPM Fan Mode turns the fan off when running at low or medium loads for almost noiseless operation. Compatible with Modern Standby for low-load efficiency and quick wake-up time from sleep. Resonant LLC Topology supplies clean and steady power with low coil whining and executes energy efficient sleep states. 105-degrees C rated capacitors are industrial grade and capable of powerful electrical performance and long-term reliability. 80 PLUS GOLD certification means this power supply boasts up to 90% efficiency in power consumption which means less power is wasted.