Corsair RM850x, 850W, 90% 80+ Gold, Fully Modular


Power your way through your favorite titles or the online competition with the RM850x 850W 80 PLUS Gold Modular Power Supply from Corsair. Utilizing a single +12V rail, this power supply meets Intel ATX Version 2.4 specifications. A 135mm magnetic levitation fan ensures ample cooling and quiet operation via Zero RPM Mode.

Delivering up to 90% efficiency, this 80 PLUS Gold PSU incorporates a modular design with flat sleeved cables. Connect components via a motherboard, three CPU, four PCIe, 14 SATA, and four 4-pin peripheral connectors. The RM850x has a mean time between failures (MTBF) of 100,000 hours and incorporates over-voltage, under-voltage, short-circuit, over-temperature, and over-power protection.

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Series RMx Series (2021) RM850x
Type ATX12V / EPS12V
Maximum Power  850 W
Fans  1 x 135mm Magnetic Levitation Fan
Main Connector  24Pin
+12V Rails  Single
PCI-Express Connector  4 x 6+2-Pin
SATA Power Connector  14
Modular  Full Modular
Energy-Efficient 80 PLUS GOLD Certified
Over Voltage Protection  Yes
Input Voltage 100 - 240 V
Input Frequency Range 47 - 63 Hz
Input Current 10A - 5A
Output +3.3V@20A, +5V@20A, +12V@70.8A, -12V@0.3A, +5VSB@3A
MTBF  100,000 hours
Approvals FCC, ICES, CE, UL / CUL, CSA, C-Tick/RCM, TUV, CB, CU, KC Mark, RoHS, WEEE, RoHS (China), REACH
Max PSU Length 160 mm
Connectors 1 x 24 pin ATX
3 x 8 pin (4+4) EPS (CPU)
4 x 8 pin (6+2) PCIe
14 x SATA
4 x 4 pin Peripheral
Cable Spec 24Pin MB: One cable (610mm)
4+4Pin CPU: Three cables (650mm)
2 x PCI 6+2Pin: Two cables (600+150mm)
4 x SATA: Two cables (505+115+115+115mm)
3 x SATA: Two cables (520+115+115mm)
4 x 4pin PERIPHERAL: One cable (450+100+100+100mm)
Features Fully Modular: Only connect the cables your system needs, making clean and tidy builds easier.
135mm Magnetic Levitation Fan: Utilizes a magnetic levitation bearing and custom engineered rotors for high performance, low noise, and superior reliability.
EPS12V Connector: For wide compatibility with modern graphics cards and motherboards.
100% All Japanese 105°C Capacitors: Premium internal components ensure unwavering power delivery and long-term reliability.
Modern Standby Compatible: Extremely fast wake-from-sleep times and better low-load efficiency.
80 PLUS Gold Certified: High efficiency operation for lower power consumption, less noise, and cooler temperatures.
Zero RPM Fan Mode: At low and medium loads the cooling fan switches off entirely for near-silent operation.
Resonant LLC Topology with DC-to-DC Conversion: Provides clean, consistent power, reduces coil whine for quieter operation, and enables use of more energy efficient sleep states.
Dimensions 3.39" x 5.91" x 6.30"
Weight 3.75 lbs.
Package Content RM850X
Safety leaflet
AC cable
DC cable set
Mounting screws
Cable ties
Date First Available March 22, 2021
10 Items
Form Factor