NZXT

NZXT C850 SFX Gold

Name: NZXT C850 SFX Gold - 850W SFX ATX 3.1 Power Supply - 80 Plus Gold - Cybenetics Platinum - Fully Modular - PCIe 5.1 600W 12V-2x6 - Japanese Capacitors
Brand: NZXT
SKU: B0GFVSV779

Bottom line: The NZXT C850 SFX Gold is a specs-and-price decision rather than a crowd-consensus one in the power supplies & cables category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-20

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference. About the author →

Before you buy

Confirm socket / form-factor / power-rating compatibility against your build before ordering
Used and vintage listings vary by seller and condition — check the listing photos, description and return terms before buying

Manufacturer description

The NZXT C850 SFX Gold (PS-8G1BB-US) is an efficient, compact solution built for your small form factor (SFF) setup. It's fully ATX 3.1 compliant and includes a 600W 12V-2x6 connector, ensuring steady performance for demanding graphics cards. Experience stable, quiet, and cool power delivery, all within a tiny footprint.

SpecPicks Verdict

SpecPicks scored NZXT C850 SFX Gold using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies & cables category. NZXT's power supplies & cables lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies & cables of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

DESIGNED FOR COMPACT BUILDS — Maximize space efficiency with the SFX form factor, delivering full-power capabilities in a size optimized for small form factor (SFF) cases.
RELIABLE GPU POWER — ATX 3.1 certification and a 600W 12V-2x6 connector ensure safe, dependable power delivery for modern graphics cards.
PREMIUM EFFICIENCY, QUIET OPERATION — 80 PLUS Gold and Cybenetics Platinum efficiency ratings reduce heat output, while a Cybenetics A- noise rating ensures quieter system performance.
UNINTERRUPTED SYSTEM PERFORMANCE — Low ripple noise, tight voltage regulation, and long hold-up time help protect components and maintain system stability.
SILENT COOLING WITH FDB FAN — A 92 mm fluid dynamic bearing (FDB) fan provides durable, efficient cooling and includes a Zero RPM mode for silent operation.
ENHANCED DURABILITY AND STABILITY — Built with 105°C-rated Japanese capacitors to ensure long-term reliability and consistent performance, even during heavy workloads.

Full Specifications

Brand	NZXT
Color	Black
Wattage	850 watts
Model Name	PS-8G1BB-US 28892779
Unit Count	1 Count
Form Factor	SFX
Model Number	PS-8G1BB-US
Compatibility	PC
Connector Type	ATX
Cooling Method	Air
Number of Fans	1
Output Wattage	850 watts
Item Dimensions	4.92 x 3.94 x 2.5 inches
Mfr Part Number	PS-8G1BB-US
Number of Items	1
Compatible Devices	SFF PC Cases
Power Supply Design	Full Modular
Warranty Description	10 Year Manufacturer
Maximum Input Voltage	120 volts_of_alternating_current
Item dimensions L x W x H	4.92 x 3.94 x 2.5 inches
Full listing title	NZXT C850 SFX Gold - 850W SFX ATX 3.1 Power Supply - 80 Plus Gold - Cybenetics Platinum - Fully Modular - PCIe 5.1 600W 12V-2x6 - Japanese Capacitors - Black

Ready to buy?

NZXT C850 SFX Gold - 850W SFX ATX 3.1 Power Supply - 80 Plus Gold - Cybenetics Platinum - Fully Modular - PCIe 5.1 600W 12V-2x6 - Japanese Capacitors - Black is vintage hardware; the used and vintage market on eBay carries most of the live inventory. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. It also has an Amazon listing — check it for current price and availability. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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