Corsair CP-9020180-NA RM850x 850W 80+ Gold Fully Modular PSU

The Corsair RM850x is an 850-watt fully modular power supply built for PC enthusiasts who demand both performance and quiet operation. At its core, the unit carries an 80 Plus Gold certification, meaning it achieves at least 90% energy efficiency at typical loads — translating directly into lower electricity bills, reduced heat output, and less strain on your system's cooling. The fully modular cable design lets you attach only the power cables your specific build needs, eliminating unused cable clutter that can obstruct airflow and make cable management a chore.

Reliability is a central pillar of the RM850x's design. Corsair equips it exclusively with industrial-grade Japanese capacitors rated to 105°C, ensuring consistent voltage delivery and extended service life even under sustained heavy loads. The Zero RPM fan mode keeps the unit completely silent during light and moderate workloads by shutting the fan off entirely; it spins up only when thermal demand requires it, making this PSU an excellent choice for noise-sensitive setups. With a continuous power rating tested at 50°C ambient temperature, the RM850x is engineered to deliver its full 850 watts reliably in real-world conditions, not just in ideal lab environments.