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Black rectangular ATX power supply with modular cable ports and a 120mm fan grille

NZXT

NZXT NP-C850M-US C850 850 W power supply

SKU CH-74AR-X1J80 MPN NP-C850M-US

An 850 W ATX unit with full modular cabling, a 120 mm fluid-dynamic-bearing fan, 80 PLUS Gold efficiency and six PCIe plus eight SATA connectors

  • TypeATX12V v2.4 / EPS12V v2.92
  • Maximum Power850 W
  • ModularFull Modular
  • Fans1 x 120mm Fluid Dynamic Bearing Fan
  • PFCActive
  • Main Connector24Pin

Options ATX 80+ Gold (850W)

  • 850 W output powers demanding multi-GPU builds
  • 80 PLUS Gold efficiency reaches 90 percent at 50 percent load
  • Full modular cabling keeps the interior tidy
  • Single +12 V rail delivers 70 A for stable GPU power
  • 120 mm fluid dynamic bearing fan runs quietly under load

C850 850 W ATX power supply

The NZXT C850 is an 850 W ATX12V v2.4 unit built for desktop systems that need reliable, high-output power. Its fully modular cable set lets builders connect only what the build requires. A single 120 mm fluid-dynamic-bearing fan handles cooling. Over-voltage protection guards connected components.

ATX12V v2.4 interface limits

The ATX12V v2.4 and EPS12V v2.92 specifications define the connector layout and voltage regulation this unit follows. Input accepts 100-240 V at 50/60 Hz, drawing 12-6 A depending on mains voltage. The single +12 V rail delivers up to 70 A, while +3.3 V and +5 V rails each provide 20 A. Efficiency reaches 87 % at 20 % load, 90 % at 50 % load and 87 % at full load measured at 115 Vac.

850 W capacity and headroom

Six 6+2-pin PCIe connectors and two 4+4-pin CPU cables support multi-GPU configurations and high-end processors. Eight SATA power plugs and six peripheral connectors cover storage and accessories. The gold-certified platform maintains its rated output up to the 850 W ceiling; sustained loads beyond that rating exceed the design envelope. MTBF exceeds 100,000 hours under normal operating conditions.

Highlights

  • 850 W output powers demanding multi-GPU builds
  • 80 PLUS Gold efficiency reaches 90 percent at 50 percent load
  • Full modular cabling keeps the interior tidy
  • Single +12 V rail delivers 70 A for stable GPU power
  • 120 mm fluid dynamic bearing fan runs quietly under load

Specifications

BrandNZXT
ModelNP-C850M-US
SeriesC850
Part NumberNP-C850M-US
TypeATX12V v2.4 / EPS12V v2.92
Maximum Power850 W
ModularFull Modular
Fans1 x 120mm Fluid Dynamic Bearing Fan
PFCActive
Main Connector24Pin
+12V RailsSingle
PCI-Express Connector6 x 6+2-Pin
SATA Power Connector8
Efficiency20% loading: 87%, 50% loading: 90%, 100% loading: 87% @115Vac
Energy-Efficient80 PLUS GOLD Certified
Over Voltage ProtectionYes
Input Voltage100 - 240 V
Input Frequency Range50/60 Hz
Input Current12 - 6A
Output+3.3V@20A, +5V@20A, +12V@70A, [email protected] , +5VSB@3A
MTBF>100,000 Hours
ApprovalsCB / CE / FCC / TUV / cTUV-SUDus / China CCC / Taiwan BSMI / Australia RCM / EAC
Connectors1 x 24-pin ATX power
2 x 4+4-pin CPU power
6 x PCIe (6+2 pin)
8 x SATA
6 x Peripherals
Max PSU Length150 mm
Dimensions3.39" x 5.91" x 5.91"
FeaturesThe C series fits any case conforming to the ATX standard with the C750 and C650 support NVIDIA GPUs up to 2080ti and AMD GPUs up to Vega 64. The C850 can support multi-GPU configurations
A push of a button enables Zero RPM Fan mode, silencing the fan under low-load conditions. When needed, the 120mm fluid-dynamic bearing fan spins up to efficiently cool the PSU, keeping your system stable and running through even the most intense gaming session.
The new C Series power supply from NZXT features safe, reliable power while ensuring optimal efficiency and quieter performance. Manufactur
Package ContentIncluded Cables
1 x 24-pin ATX power (length:610mm, Nylon sleeving)
2 x 4+4-pin CPU power (length:650mm, Nylon sleeving)
3 x PCIe (6+2 pin) (length:675 +75mm, Nylon sleeving)
2 x SATA (length: 500 + 100 + 100 + 100mm)
2 x Peripherals (length: 500 + 100 + 100mm)
Shipping weight2.99 kg
Package size330 × 229 × 127 mm

Other versions of this model

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Questions about this item

Should I pick the C850 850 W unit or a lower-wattage model such as the C750 750 W or C650 650 W?

Choose the 850 W model if your build needs up to 70 A on the +12 V rail for multi-GPU configurations; the 750 W and 650 W units are specified for GPUs up to 2080 Ti or Vega 64.

What does the 80 PLUS GOLD rating tell me about efficiency at typical loads?

At 115 V input the unit delivers 87 % efficiency at 20 % load, 90 % at 50 % load and 87 % again at full 850 W load.

How does the ATX12V v2.4 and EPS12V v2.92 standard affect the connectors I can use?

The design provides one 24-pin ATX connector, two 4+4-pin CPU connectors, six 6+2-pin PCIe connectors, eight SATA connectors and six peripheral connectors.

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