NZXT PA-8G2BB-US C850 Gold ATX 3.1 Fully Modular PSU 850W

Name: NZXT PA-8G2BB-US C850 Gold ATX 3.1 Fully Modular PSU 850W
Brand: NZXT
SKU: PA-8G2BB-US

Overview

The NZXT C850 Gold (PA-8G2BB-US) is a fully modular 850W power supply built to the ATX 3.1 standard, making it a forward-looking choice for modern gaming PC builds. Its headline feature is the native 12V-2x6 connector, which can deliver up to 600W to compatible NVIDIA GeForce RTX 40 Series graphics cards through a single clean cable — no adapters required. With 80 PLUS Gold certification, it operates at high efficiency across a range of loads, keeping energy waste and heat generation to a minimum.

Inside, the C850 Gold relies on 100% Japanese capacitors for dependable voltage regulation and long-term durability. Cooling comes from a 135mm fluid dynamic bearing fan that operates in Zero Fan Mode below 50% load, meaning the PSU remains completely silent during typical gaming sessions and everyday use. The fully modular cable design lets builders use only the cables they need, simplifying cable management and improving case airflow. Finished in black and designed to complement NZXT's ecosystem of cases and components, the C850 Gold is a well-rounded PSU for anyone building a high-performance system that values clean aesthetics and quiet operation.

Key Features

ATX 3.1 — Compliant with the ATX 3.1 standard to fuel high-performance PC components with stability, efficiency, and power spike resistance.

40 SERIES READY — Durable, heat-resistant 12V-2x6 connector pumps up to 600 watts to NVIDIA GeForce RTX 40 Series graphics cards.

HIGH EFFICIENCY, LOW NOISE — Awarded certifications of 80 PLUS Gold Efficiency, Cybenetics Gold Efficiency, and Cybenetics A- Noise Level.

ULTRA-LOW NOISE FAN — 135mm fluid dynamic bearing fan with Zero Fan Mode is completely silent when under 50% load.

HIGH-QUALITY CONSTRUCTION — 100% premium Japanese capacitors improve hold-up time and minimal ripple noise, ensuring reliable and stable power delivery.

Specifications

Brand

NZXT

Model

PA-8G2BB-US

Wattage

850 Watts

Efficiency

80 PLUS Gold

Form Factor

ATX

Modularity

Fully Modular

GPU Connector

12V-2x6 (up to 600W)

Fan

135mm Fluid Dynamic Bearing

Fan Mode

Zero Fan Mode (silent under 50% load)

Capacitors

100% Japanese

Compliance

ATX 3.1

Color

Black

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Pros & Cons

👍 Pros

Native 12V-2x6 connector provides clean single-cable power to modern GPUs without adapters
Zero Fan Mode keeps the unit completely silent during light to moderate workloads
Fully modular cable design allows clean builds with only the cables you need
100% Japanese capacitors contribute to long-term reliability and stable voltage output
ATX 3.1 compliance ensures compatibility with current and upcoming platform standards

👎 Cons

850W may be insufficient for the highest-end dual-GPU or overclocked configurations
80 PLUS Gold efficiency trails Platinum and Titanium rated alternatives
All-black aesthetic may not suit builds with white or RGB color themes
No included cable combs or cable management accessories in the box

Frequently Asked Questions

Does the NZXT C850 Gold support the newest NVIDIA graphics cards?

Yes, it includes a native 12V-2x6 connector capable of delivering up to 600W directly to NVIDIA GeForce RTX 40 Series GPUs, eliminating the need for adapter cables.

How loud is the NZXT C850 Gold during normal use?

The 135mm fluid dynamic bearing fan features a Zero Fan Mode that keeps the PSU completely silent when operating below 50% load, which covers most typical gaming and productivity scenarios.

What does "fully modular" mean for this power supply?

Fully modular means all cables — including the 24-pin motherboard cable — are detachable. You only connect the cables you need, which reduces clutter and improves airflow inside your case.

What efficiency rating does the NZXT C850 Gold have?

It is 80 PLUS Gold certified, meaning it operates at 87–90% efficiency under typical loads, reducing wasted energy as heat and lowering electricity costs.

Are the capacitors in this PSU high quality?

Yes, the C850 Gold uses 100% Japanese capacitors, which are known for their reliability, longer lifespan, and stable performance under sustained loads.