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Black rectangular ATX power supply unit with modular cable ports and a 140mm fan grille

Corsair

Corsair RM650x 2018 CP-9020178-NA 650 W power supply

SKU CH-S4W9-5YHV6 MPN CP-9020178-NA

Fully modular ATX power supply delivers 650 W with 80 Plus Gold efficiency and a 140 mm low-noise fan

  • TypeATX12V / EPS12V
  • Maximum Power650 W
  • Fans1 x 140mm Low Noise Rifle Bearing Fan
  • Main Connector20+4Pin
  • +12V RailsSingle
  • PCI-Express Connector4 x 6+2-Pin

Options ATX 80+ Gold (650W)

  • Efficient 80 PLUS Gold certification reduces waste heat
  • Fully modular cables simplify case wiring
  • Single +12V rail delivers 54A for stable GPU power
  • 140mm low-noise fan keeps acoustics down
  • Compact 160mm depth fits smaller chassis

650 W ATX power supply for PC builders

This Corsair RM650x 2018 unit delivers 650 W through a single +12 V rail rated at 54 A. It fits standard ATX12V and EPS12V layouts and carries 80 PLUS Gold certification for 90 % typical efficiency. The fully modular design lets system builders connect only the cables their build requires.

Full modular cables reduce internal clutter

The package supplies a 24-pin ATX connector, one 8-pin EPS cable, four 6+2-pin PCIe cables, nine SATA connectors, four peripheral plugs and a floppy adapter. Because every lead detaches from the unit, unused cables stay out of the case, improving airflow and simplifying cable routing during assembly.

160 mm depth fits most mid-tower cases

At 160 mm long the power supply sits comfortably in typical chassis without blocking drive bays or radiator mounts. A 140 mm rifle-bearing fan runs quietly under load, while over-voltage protection and a 100 000-hour MTBF rating support long-term reliability.

Highlights

  • Efficient 80 PLUS Gold certification reduces waste heat
  • Fully modular cables simplify case wiring
  • Single +12V rail delivers 54A for stable GPU power
  • 140mm low-noise fan keeps acoustics down
  • Compact 160mm depth fits smaller chassis

Specifications

BrandCORSAIR
SeriesRMx Series RM650x 2018
ModelCP-9020178-NA
TypeATX12V / EPS12V
Maximum Power650 W
Fans1 x 140mm Low Noise Rifle Bearing Fan
Main Connector20+4Pin
+12V RailsSingle
PCI-Express Connector4 x 6+2-Pin
SATA Power Connector9
Max PSU Length160 mm
ModularFull Modular
Energy-Efficient80 PLUS GOLD Certified
Over Voltage ProtectionYes
Input Voltage100 - 240 V
Input Frequency Range47 - 63 Hz
Input Current10A - 5A
Output+3.3V@25A, +5V@25A, +12V@54A, [email protected] , +5VSB@3A
MTBF100;000 hours
Connectors1 x ATX 24-PIN (20+4)
1 x EPS/ATX12V 8-PIN (4+4)
4 x PCIe 8-PIN (6+2)
9 x SATA (3 SATA)
4 x PERIPHERAL (4-PIN)
1 x FLOPPY DRIVE ADAPTER (4-PIN)
Features80 PLUS Gold Certified: High efficiency operation for lower power consumption, less noise and cooler temperatures.
Tuned for Low Noise Operation: A specially set fan curve ensures that, even at full load, fan noise is kept to a minimum.
Zero RPM Fan Mode: At low and medium loads the cooling fan switches off entirely for near-silent operation.
100% All Japanese 105°C Capacitors: Premium internal components ensure unwavering power delivery and long-term reliability.
Fully Modular Cables: Only connect the cables your system needs, making clean and tidy builds easier.
Compact Size: A 160
Dimensions3.39" x 5.91" x 6.30"
Weight3.36 lbs.
Package ContentRMx Series ATX Power Supply
Power cord
Mounting screws
Cable ties
Corsair case badge
User manual
Shipping weight3.01 kg
Package size291 × 208 × 130 mm

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Questions about this item

How often will the 140 mm rifle-bearing fan need cleaning or replacement?

The fan uses a rifle bearing rated for 100;000 hours MTBF; under normal desktop use it should run for years without maintenance, and the fully modular design lets you swap the entire unit if the fan ever fails.

What limit appears first when the supply runs at full 650 W continuously?

The single +12 V rail delivers up to 54 A; sustained loads at that level will hit the rail's current ceiling before any other protection triggers.

How much heat and noise does the unit produce during an all-day workload?

At typical loads the 80 PLUS Gold efficiency keeps waste heat low, and the 140 mm low-noise fan spins slowly, so audible noise stays minimal even after hours of operation.

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