NZXT C850 Gold ATX 3.1 vs Seasonic FOCUS GX-750 ATX 3.1

Researched, not hands-on tested.How we review ›

all judged against power supplies at a similar price

The Seasonic FOCUS GX-750 ATX 3.1 scores 7.3/10 overall, ahead of the NZXT C850 Gold ATX 3.1 at 6.7/10.

The NZXT C850 Gold ATX 3.1 leads on noise.

The Seasonic FOCUS GX-750 ATX 3.1 leads on quality and protections and warranty.

They score the same on efficiency and cabling and connectors.

NZXT C850 Gold ATX 3.1

6.7/10verdict: good, not the best

The NZXT C850 Gold ATX 3.1 is an 850 W fully modular power supply for single-GPU builds. It suits buyers who want a native 12V-2x6 cable and a quiet fan at low and moderate loads. The 10-year warranty adds reassurance for a unit meant to stay in a case for a long time.

Typically about £110.74 in the UK when we researched itSearch Amazon UK

Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details

Seasonic FOCUS GX-750 ATX 3.1

7.3/10verdict: good, not the best

The Seasonic FOCUS GX-750 ATX 3.1 suits builders who want a fully modular 750 W unit with a modern GPU power connector. It fits compact ATX cases thanks to its 140 mm depth and backs that with a 10-year warranty. It is best for a single-graphics-card desktop or an always-on machine where low standby draw matters.

Typically about £119.99 in the UK when we researched itSearch Amazon UK

Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details

Scores, criterion by criterion

Criterion	Weight	NZXT C850 Gold ATX 3.1	Seasonic FOCUS GX-750 ATX 3.1
Quality and protections	30%	5/10	7/10
Efficiency	20%	7/10	7/10
Cabling and connectors	20%	7/10	7/10
Noise	15%	7/10	6/10
Warranty	15%	9/10	10/10
Overall		6.7/10	7.3/10

Specifications

Spec	NZXT C850 Gold ATX 3.1	Seasonic FOCUS GX-750 ATX 3.1
Rated output (W)	850 W	750 W
Efficiency rating (80 Plus or Cybenetics)	80 PLUS Gold and Cybenetics Gold; measured at 115 V: 85.8% at 10% load, 89.5% at 20%, 91.7% at 50%, 89.2% at 100%	80 PLUS Gold; Cybenetics Platinum listed on v5 page
Form factor (ATX or SFX) and ATX 3.x / PCIe 5.x support	ATX 3.1, 150 x 86 x 160 mm	ATX/EPS, 140 mm depth
Modular cabling (fully, semi or non-modular)	Fully modular	Fully modular
Graphics card connectors (12V-2x6 / 12VHPWR and PCIe 8-pin count)	1x 16-pin 12V-2x6 (rated up to 600 W per NZXT) and 3x 8-pin (6+2) PCIe	2× EPS, 2× PCIe 6+2-pin, 1× PCIe 12+4-pin (600 W), 8× SATA on 2 cables, 3× Molex on 1 cable (v4 model); native 12V-2×6 cable (v5)
Fan size and zero-fan mode	135 mm fluid dynamic bearing, PWM, 2,300 RPM ±10%, maximum noise 44.5 dBA, Zero RPM mode; silent below 50% load	135 mm fluid dynamic bearing, Digital Hybrid Fan Control
Warranty (years)	10 years	10 years

Strengths and weaknesses

NZXT C850 Gold ATX 3.1

+ 10-year warranty
+ Fully modular with native 12V-2x6 cable
+ Fan stays off below 50% load
− Only three 8-pin PCIe connectors
− Maximum noise rated at 44.5 dBA
− Efficiency drops to 85.8% at 10% load

Skip it if:

Builders running several GPUs that need more than three 8-pin PCIe connectors
Buyers who want Platinum-level efficiency at very low load
Anyone who needs published ripple and regulation data before buying

Read the full NZXT C850 Gold ATX 3.1 review ›

Seasonic FOCUS GX-750 ATX 3.1

+ Ten-year warranty
+ Fully modular with 12+4-pin or 12V-2×6 cable
+ Standby draw measured under 0.06 W
− Only two PCIe 6+2-pin connectors
− One owner found it noisy in normal fan mode
− Connector details differ between v4 and v5 revisions

Skip it if:

Builders planning several graphics cards that each need PCIe 8-pin cables
Buyers who want the quietest possible unit in normal fan mode

Read the full Seasonic FOCUS GX-750 ATX 3.1 review ›

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