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Black rectangular ATX power supply with 135 mm fan and modular cable sockets

NZXT

NZXT PA-8G3BB-US C850 Gold Core 850 W power supply

SKU CH-4NGB-YHB1V MPN PA-8G3BB-US

An ATX 3.1 fully modular 850 W power supply with 80 PLUS Gold efficiency, Cybenetics A++ noise rating and a 600 W 12V-2x6 connector for modern GPUs

  • ColorBlack
  • TypeATX 3.1 Compatible / EPS12V
  • Maximum Power850 W
  • Fans1 x 135 mm
  • PFCActive
  • Main Connector24Pin

Option ATX 80+ Gold (850W)

  • ATX 3.1 and PCIe 5.1 ready for modern GPUs with 12V-2x6 connector
  • 80 PLUS Gold and Cybenetics Platinum efficiency at 89.53% reduces heat and power draw
  • Cybenetics A++ noise rating below 15 dBA for near-silent operation
  • 135 mm fluid dynamic bearing fan with Zero RPM mode stops during light loads
  • Fully modular design with embossed cables simplifies routing and keeps builds clean

Modern GPU Power

The NZXT C850 Gold Core is an ATX 3.1 power supply rated at 850 W. It targets builders who need a single +12 V rail for modern graphics cards and a fully modular cable set to keep the chassis tidy.

Build and Connectors

A 135 mm fluid dynamic bearing fan runs in Zero RPM mode during light loads, earning a Cybenetics A++ noise rating below 15 dBA. The unit measures 150 mm deep and uses premium 105 °C capacitors. Main power comes from a 24 Pin connector, while GPU power is delivered through a dual-color 12V-2x6 PCIe 5.1 connector rated at 600 W plus two 6+2 Pin PCIe cables. Eight SATA power connectors handle drives and peripherals. Full modularity means only required cables are installed.

Upgrade Path

This unit replaces older ATX supplies that lack PCIe 5.1 native connectors or Gold-class efficiency. The jump is worthwhile when moving to a GPU that demands the 12V-2x6 interface or when a quieter, more efficient 850 W platform is needed for sustained heavy loads.

Highlights

  • ATX 3.1 and PCIe 5.1 ready for modern GPUs with 12V-2x6 connector
  • 80 PLUS Gold and Cybenetics Platinum efficiency at 89.53% reduces heat and power draw
  • Cybenetics A++ noise rating below 15 dBA for near-silent operation
  • 135 mm fluid dynamic bearing fan with Zero RPM mode stops during light loads
  • Fully modular design with embossed cables simplifies routing and keeps builds clean

Specifications

BrandNZXT
SeriesC Series Gold Core
ModelC850 Gold Core
Part NumberPA-8G3BB-US
ColorBlack
TypeATX 3.1 Compatible / EPS12V
Maximum Power850 W
Fans1 x 135 mm
PFCActive
Main Connector24Pin
+12V RailsSingle
PCI-Express Connector2 x 6+2-Pin
SATA Power Connector8
Max PSU Length150 mm
ModularFull Modular
Efficiency89.53% @ 115 V @ 100% Load
Energy-Efficient80 PLUS GOLD Certified
PSU Noise LevelCybenetics A++
ProtectionOVP (Over Voltage Protection), UVP (Under Voltage Protection), SCP (Short Circuit Protection), OTP (Over Temperature Protection), OPP (Over Power Protection), OCP (Over Current Protection)
Input Voltage100 - 240 V
Input Frequency Range50/60 Hz
Input Current10 - 5 A
Output+3.3V@20A, +5V@20A, [email protected] , 5VSB@3A
MTBF>100,000 Hours
ApprovalsCE, UKCA, FCC, IC, BSMI, CB (IEC 62368-1 Ed. 3), RCM, KC
Cable Spec24-pin ATX Power Cable: 600 mm (1)
4+4-pin CPU Power Cable: 700 mm (1)
8-pin CPU Power Cable: 700 mm (1)
6+2-pin PCIe Power Cable: 650 mm (3)
16-pin (12+4) 12V-2x6 PCIe power Cable: 650 mm (1) (600W)
SATA Cables: 500 + 100 mm (8)
Peripherals Cable: 500 + 100 mm (3)
Dimensions150 x 86 x 150mm
Weight1.6kg
Shipping weight3.18 kg
Package size310 × 216 × 137 mm

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Questions about this item

What does ATX 3.1 support mean for the 12V-2x6 connector on this 850 W unit?

The 12V-2x6 connector is rated for 600 W, meeting the ATX 3.1 and PCIe 5.1 specifications for modern GPUs.

What case clearance is required for the 150 mm long fully modular chassis?

The power supply is 150 mm deep, so the case must provide at least that much clearance behind the motherboard tray.

How is the 12V-2x6 cable installed, and what indicates a secure connection?

Plug the dual-color 12V-2x6 cable firmly until the colored housing seats flush, showing the connection is fully engaged.

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