NZXT

NZXT C850 Gold

Expert rating8.3 / 10

Wattage:: 850 W
80 PLUS Rating:: Gold
Modularity:: Fully Modular
ATX Standard:: ATX 3.1

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Manufacturer: NZXT Last updated: 2026-09-12

NZXT C850 Gold Review

NZXT C850 Gold 850W 80 Plus Gold fully modular power supply, ATX 3.0 certified, ATX form factor, native 12V-2x6/12VHPWR connector, 10-year warranty, Seasonic platform.

The NZXT C850 Gold is the mainstream 850W C-series unit, a popular pairing for NZXT's H-series white cases thanks to matching sleeved white cables. Rated 850W at 80 PLUS Gold (Cybenetics Gold efficiency / A noise), it's built on a Seasonic platform with a 120mm fluid dynamic bearing fan running a zero-RPM semi-passive mode at idle. Fully Modular cabling and a 150mm chassis depth make it a realistic fit for a popular RTX 4070 Ti / RTX 5070-class gaming build, and it's backed by a 10-year warranty.

Efficiency, Noise, and Build Quality

The C850 Gold carries an 80 PLUS Gold certification and a Cybenetics Gold efficiency / A noise rating, translating to consistently high real-world efficiency at typical 50% load and low fan noise thanks to its 120mm fluid dynamic bearing, semi-passive. It uses a Seasonic platform with Japanese-made capacitors throughout for long-term reliability under sustained load.

Connectors and Cabling

Connector layout is 1x 24-pin ATX, 1x EPS 4+4, 1x 12V-2x6 (600W), 4x PCIe 6+2-pin, 6x SATA, 2x Molex. With 1 native 12V-2x6 connector(s) rated to deliver up to 600W to a single GPU, there's no need for a 4x8-pin-to-12VHPWR adapter on current-generation flagship cards. Cabling is fully modular, fully sleeved for a cleaner look straight out of the box, with a single +12V rail design that simplifies load balancing across connectors.

Comparison to Alternatives

Against the Corsair RM850x (Corsair's ATX 3.1 850W Gold mainstay), the NZXT C850 Gold matches its wattage class but differs on connector generation and OEM platform, making the choice mostly about brand ecosystem, warranty length (10 years here), and whether native 12V-2x6 connectors matter for your GPU. Compared with the be quiet! Straight Power 12 (be quiet!'s Platinum-rated acoustic specialist), the C850 Gold sits in the popular high-end gaming bracket at 850W, so the decision usually comes down to matching wattage headroom to your actual GPU/CPU combo rather than one being categorically better.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Expert rating8.3 / 10

A solid 850W Gold-rated ATX unit for a popular RTX 4070 Ti / RTX 5070-class gaming build, held back only by the usual mid-tier compromises on cabling and OEM sourcing.

Best for

Builders targeting a popular RTX 4070 Ti / RTX 5070-class gaming build
Anyone who wants fully modular cabling with native 12V-2x6 support
Systems where a 10-year warranty and Gold-tier efficiency matter

Not for

Builds needing more than 850W of continuous headroom
Buyers who need the smallest possible SFX/SFX-L footprint
Cost-sensitive builds better served by a lower-tier 80+ Bronze unit

Specifications

What these specs mean

Identity

Brand	NZXT
Model Number	C850 Gold

Output and rails

Single +12V Rail	Yes

GPU power delivery

Max Watts Per GPU Conn	600 W
Native GPU Cable Incl	Yes
PCIe 6+2-pin Connectors	3

Connector inventory

SATA Connectors	12
Molex Connectors	4

Form factor and fit

Length	160 mm
Colour	White

Build quality

MTBF	100000 hours

Cables

Modularity	Fully Modular

Monitoring, protection and price

Protections	OCP, OVP, OPP, SCP, OTP, UVP
Price	139.99 USD
Warranty	10 years

Wattage	850 W
80 PLUS Rating	Gold
ATX Standard	ATX 3.1
Form Factor	ATX
Cybenetics Efficiency	Gold
Cybenetics Noise	A-
12V-2x6 Connectors	1
Zero-RPM Mode	Yes
Sleeved Cables	Yes
Connector Count	1x 24-pin ATX, 1x EPS 4+4, 1x 12V-2x6 (600W), 3x PCIe 6+2-pin, 12x SATA, 4x Molex
Fan Size	135 mm
Fan Model / Bearing	135mm fluid dynamic bearing, semi-passive
OEM / Platform	Seasonic
Japanese Capacitors	Yes
Cable Lengths	ATX 600mm, EPS 650mm, PCIe 600-750mm, SATA 500-900mm

FAQs

What are the key specifications of the NZXT C850 Gold (850W/80+ Gold/ATX 3.0/Popular High-End Gaming Tier)?

Key specs for the NZXT C850 Gold: Wattage 850 W, Modularity Fully Modular, Fan Size 135 mm, Warranty 10 years, 80 PLUS Rating Gold, Cybenetics Efficiency Gold.

Will the NZXT C850 Gold (850W/80+ Gold/ATX 3.0/Popular High-End Gaming Tier) work with my current setup?

The NZXT C850 Gold (850W/80+ Gold/ATX 3.0/Popular High-End Gaming Tier) lists Wattage is 850 W. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.

Who is the NZXT C850 Gold (850W/80+ Gold/ATX 3.0/Popular High-End Gaming Tier) best suited to?

Best suited to: Builders targeting a popular RTX 4070 Ti / RTX 5070-class gaming build; Anyone who wants fully modular cabling with native 12V-2x6 support; Systems where a 10-year warranty and Gold-tier efficiency matter.

What are the drawbacks of the NZXT C850 Gold (850W/80+ Gold/ATX 3.0/Popular High-End Gaming Tier)?

Not the best fit for: Builds needing more than 850W of continuous headroom; Buyers who need the smallest possible SFX/SFX-L footprint; Cost-sensitive builds better served by a lower-tier 80+ Bronze unit.