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

Corsair

Corsair CP-9020235-NA RM850 850 W power supply

SKU CH-8P81-WB8K6 MPN CP-9020235-NA

An 850 W ATX power supply with full modular cables, a 140 mm Rifle Bearing fan and 80 PLUS Gold efficiency

  • TypeATX
  • Maximum Power850 W
  • Fans1 x 140 mm Rifle Bearing fan
  • Max PSU Length160 mm
  • ModularFull Modular
  • Energy-Efficient80 PLUS GOLD Certified

Options RM Series (850W) Black

  • Full modular design keeps cable clutter low with only needed leads
  • 80 PLUS Gold certification delivers up to 90 percent typical efficiency at 850 W
  • 140 mm rifle-bearing fan runs quietly under load
  • 160 mm depth fits most mid-tower cases
  • Four 6+2 PCIe plus three EPS connectors support multi-GPU and high-end CPU builds

ATX 850 W fully modular unit

The Corsair RM850 CP-9020235-NA delivers 850 W through an ATX form factor with full modular cabling. It targets system builders who want clean cable routing and gold-level efficiency in a compact 160 mm depth chassis. The single 140 mm Rifle Bearing fan handles airflow across the entire unit.

Thermals and acoustics under load

A 140 mm Rifle Bearing fan spins only when internal temperatures demand it, keeping idle noise near zero. At typical gaming loads the fan remains at low RPM, moving enough air to maintain stable output without audible turbine whine. The 80 PLUS GOLD rating confirms high conversion efficiency, reducing waste heat and overall power draw from the wall.

Cabling flexibility for dense builds

Full modular design lets you attach only the 24 pin ATX, three 8 pin EPS, four 8 pin PCIe, four peripheral and fourteen SATA connectors your build actually needs. Removing unused cables improves airflow in tight cases and shortens assembly time. No software suite is bundled; the hardware alone determines the experience.

Points forts

  • Full modular design keeps cable clutter low with only needed leads
  • 80 PLUS Gold certification delivers up to 90 percent typical efficiency at 850 W
  • 140 mm rifle-bearing fan runs quietly under load
  • 160 mm depth fits most mid-tower cases
  • Four 6+2 PCIe plus three EPS connectors support multi-GPU and high-end CPU builds

Caractéristiques

BrandCORSAIR
SeriesRM850
ModelCP-9020235-NA
TypeATX
Maximum Power850 W
Fans1 x 140 mm Rifle Bearing fan
Max PSU Length160 mm
ModularFull Modular
Energy-Efficient80 PLUS GOLD Certified
Connectors1 x 24 pin ATX
3 x 8 pin (4+4) EPS (CPU)
4 x 4 pin Peripheral
4 x 8 pin (6+2) PCIe
14 x SATA
PFCNo
SLINo
CrossFireNo
Dimensions3.39" x 6.30" x 5.91"
SATA Power Connector14
Poids d’expédition3.11 kg
Dimensions du colis302 × 214 × 132 mm

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Questions sur cet article

How do I install the 140 mm Rifle Bearing fan unit and what step do builders often miss?

Mount the PSU with its 160 mm length aligned to the case cutout, secure it with four screws, then attach only the cables your build needs — forgetting to plug the 24 pin ATX and both 8 pin EPS connectors is the common oversight.

What maintenance or replacement will the 140 mm Rifle Bearing fan need over time?

The Rifle Bearing fan is rated for long life; typical upkeep is blowing dust out of the intake grille every few months — if noise or vibration appears years later, the entire fan assembly can be swapped by a qualified technician.

What limit appears first when the 850 W unit runs at sustained load?

The 80 PLUS GOLD efficiency curve means heat rises as load approaches 850 W; the internal protection will throttle output before components overheat, so continuous draw near the maximum rating is the practical ceiling.

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