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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

  • Max wattage850 W
  • Power efficiency89.53% @ 115 V @ 100% Load
  • Modular cablingFull Modular
  • Fan configuration1 × 135 mm
  • Power factor correctionActive
  • Main power connector24Pin

Model 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.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $107.99
Cheaper than about 64% of the 10,869 comparable items (median $142.99).
Max wattage 850 W
Typical for this category: the median of 930 items is 850 W.

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Specifications

Product
Brand nameNZXT
Product lineC Series Gold Core
Model nameC850 Gold Core
Part numberPA-8G3BB-US
Product colorBlack
Product typeATX 3.1 Compatible / EPS12 V
Ports & slots
PCIe power connectors2 × 6+2-Pin
SATA power connectors8
Output type+3.3 V@20A, +5 V@20A, 5VSB@3A
Power
Max wattage850 W
Power efficiency89.53% @ 115 V @ 100% Load
Modular cablingFull Modular
Power factor correctionActive
Main power connector24Pin
12V railsSingle
Efficiency certification80 PLUS GOLD Certified
Built-in protectionOVP (Over Voltage Protection), UVP (Under Voltage Protection), SCP (Short Circuit Protection), OTP (Over Temperature Protection), OPP (Over Power Protection), OCP (Over Current Protection)
Supply voltage100–240 V
AC input frequency50/60 Hz
Rated input current10–5 A
Size & build
Product dimensions150 × 86 × 150 mm
Product weight1.6kg
Shipping weight3.18 kg
Package size310 × 216 × 137 mm
Compatibility
PSU length limit150 mm
Environment & compliance
PSU noise ratingCybenetics A++
Regulatory approvalsCE, UKCA, FCC, IC, BSMI, CB (IEC 62368-1 Ed. 3), RCM, KC
More details
Fan configuration1 × 135 mm
Mean time between failures>100,000 h

Other versions of this model

2 more in the same range

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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