Corsair CP-9020200-NA RM850x 850W 80+ Gold PSU

The Corsair RM850x (CP-9020200-NA) is a fully modular ATX power supply delivering 850 watts of continuous power with 80 Plus Gold efficiency certification. That Gold rating means it operates at 90% efficiency or better at typical loads, translating to less wasted energy, lower heat output, and reduced electricity costs over the life of the unit. Every cable is fully detachable, so builders can connect only what their system requires — eliminating unused cable clutter that can obstruct airflow and complicate cable management. This is particularly valuable in mid-tower and full-tower builds where clean routing contributes to both aesthetics and thermal performance.

Internally, the RM850x is built with 100% Japanese 105°C-rated capacitors, a premium choice that ensures stable voltage delivery and long-term reliability even under sustained heavy loads where temperatures inside the PSU enclosure climb. The cooling system centers on a 135mm fan using Corsair's magnetic levitation bearing technology, which eliminates physical contact between the bearing surfaces for reduced friction, lower noise, and extended bearing life. A Zero RPM fan mode keeps the unit completely silent during low and moderate workloads, with the fan only engaging when thermal demand warrants it. With a 100-240V auto-sensing input, EPS12V connector support for modern motherboards, and Modern Standby compatibility for fast wake-from-sleep times, the RM850x is a well-rounded foundation for gaming rigs, content creation workstations, and other demanding desktop systems.