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RMi Series™ RM850i — 850 Watt 80 PLUS® Gold Certified Fully Modular PSU

Premium components for great performance with very low noise

Corsair RMi series power supplies are 80 PLUS Gold certified and give you extremely tight voltage regulation, virtually silent operation, and a fully modular cable set. With all Japanese 105°C capacitors, they’re a great choice for high-performance PCs where reliability is essential. Corsair Link Digital makes it easy to monitor power supply performance, toggle single rail or multi rail mode, and control fan speed directly from your desktop.

80 PLUS Gold certified

Gold certification ensures high-efficiency operation for less excess heat and lower operating costs.

100% Japanese 105°C capacitors

Premium internal components ensure solid power delivery and long-term reliability.

Zero RPM Fan Mode

The superior energy efficiency of the RMi Series allows for the fan to remain off at low to medium loads for virtually silent operation. And when you’re pushing it hard, the thermally controlled fan adjusts its speed to provide optimal cooling with minimal noise.

Configurable +12V rail

It’s your choice – run it in the default multi-rail +12V mode, or toggle single-rail operation.

The power of Corsair Link Digital

Our advanced desktop application lets you monitor and log fan speed, voltages and power consumption, as well as control fan speed and configure +12V rail operation.

Package contents

RMi Series High-Performance ATX Power Supply

AC power cord

DC Modular cable set

DC Modular cable storage bag

Cable ties

Corsair badge

Corsair Link Digital interface cable

Corsair Link USB cable

User Manual


ATX12V v2.4 and EPS12V 2.92 standards


Corsair Link Integration for monitoring performance and adjustment of fan speed and multi-rail/single rail mode.

80 PLUS® Gold efficiency, delivering 90% energy efficiency at real-world load conditions.

ZeroRPM mode for fanless operation at low loads and outstanding noise reduction.

135mm thermally controlled fluid dynamic bearing fan spins up as needed.

Fully modular cables for easy installation, less clutter, and helps maximize airflow through your computer’s chassis.

Engineered to meet maximum power output at a server-grade 50°C temperature rating.

Fan self-test switch to determine fan functionality even before installation.

Over-voltage protection, under-voltage protection, short circuit protection, overpower protection and over-temperature protection provide maximum safety to your critical system components.

Safety and Agency Approvals: FCC, ICES, CE, UL / CUL, CSA, C-Tick/RCM, TUV, CB, CU, KC Mark, RoHS, WEEE, RoHS (China), REACH

80 Plus Gold
Wattage 850
Fan bearing technology Fluid Dynamic Bearing
Fan size (mm) 135mm
Power 850 Watts
Continuous output rated temperature (°C) 50°C
Modular Fully
MTBF 100,000 hours
ATX Connector 1
EPS Connector 2
Floppy Connector 2
SATA Connector 10
Plug Type NA
Weight 1.98kg
Dimension 150mm x 86mm x 180mm
Zero RPM Fan Mode Yes
4-Pin Peripheral Connector 8
Cable Type Sleeved and Flat Black Cables
Corsair Link Support Yes
PCIe Connector 6
Warranty Ten Years




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