CORSAIR RM850x 850W 80+ Gold Fully Modular Power Supply

CORSAIR 850W GOLD FULLY MODULAR RM850x

The CORSAIR RM850x is a premium 850W fully modular power supply featuring 80+ Gold efficiency, ATX 3.1 compliance, and PCIe 5.1 support. Built with 100% Japanese 105°C capacitors, a low‑noise 140mm FDB fan, and Zero RPM mode, it delivers stable, silent, and reliable power for high‑performance gaming systems and next‑gen GPUs.

Specifications

Form Factor: ATX 
Series: CORSAIR RMx Series
Wattage: 850 W
Modular: Fully Modular
Compatibility: ATX 3.1 EPS 12V PCIe 5.1 (native 12V‑2×6 connector)
Connectors:
1 × ATX Motherboard (20+4‑pin)
2 × 4+4‑pin ATX/EPS (CPU)
3 × PCI‑e 6+2‑pin (GPU)
1 × 12+4‑pin PCI‑e (12V‑2×6)
8 × SATA
3 × Peripheral (Molex)
Rail Design: Single +12V rail +12V Output: 70.8A (typical RM850x rating)
AC Input: 100–240 VAC
Fan Type: 140mm Low‑Noise Fan
Fan Bearing: Fluid Dynamic Bearing (FDB)
Zero RPM Mode: Yes
Noise: Silent at low/medium loads (Zero RPM), Quiet operation under gaming workloads
Certification: 80+ Gold High efficiency for reduced heat and lower power draw

Efficiency (Typical)

20% load: ~90%
50% load: ~92%
100% load: ~89%

Protection

Over Temperature Protection (OTP)
Over Current Protection (OCP)
Over Power Protection (OPP)
Short Circuit Protection (SCP)
Over Voltage Protection (OVP)
Under Voltage Protection (UVP)

Package Contents

RM850x Power Supply
DC Cable Kit
UK Power Cord
Mounting Screws
Cable Ties
Dimensions (L×W×H): 160 × 150 × 86 mm
Gross Weight: 3.52 kg