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Corsair SF750 SFX Fully Modular 80 PLUS Platinum vs NZXT C850 Gold ATX 3.1

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

all judged against power supplies at a similar price

The Corsair SF750 SFX Fully Modular 80 PLUS Platinum scores 7.4/10 overall, ahead of the NZXT C850 Gold ATX 3.1 at 6.7/10.

The Corsair SF750 SFX Fully Modular 80 PLUS Platinum leads on quality and protections and efficiency.

The NZXT C850 Gold ATX 3.1 leads on warranty.

They score the same on cabling and connectors and noise.

Corsair SF750 SFX Fully Modular 80 PLUS Platinum

Corsair SF750 SFX Fully Modular 80 PLUS Platinum

7.4/10verdict: good, not the best

The Corsair SF750 is a 750 W SFX power supply for small-form-factor builds that need a modern GPU cable. It suits buyers who want Platinum efficiency, quiet running and ATX 3.1 support in a compact case. It fits a single-GPU system better than a build that needs many PCIe 8-pin connectors.

Typically about £137.97 in the UK when we researched itSearch Amazon UK (opens in a new tab, affiliate link)

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

NZXT C850 Gold ATX 3.1

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 (opens in a new tab, affiliate link)

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

Scores, criterion by criterion

CriterionWeightCorsair SF750 SFX Fully Modular 80 PLUS PlatinumNZXT C850 Gold ATX 3.1
Quality and protections30%7/105/10
Efficiency20%9/107/10
Cabling and connectors20%7/107/10
Noise15%7/107/10
Warranty15%7/109/10
Overall7.4/106.7/10

Specifications

SpecCorsair SF750 SFX Fully Modular 80 PLUS PlatinumNZXT C850 Gold ATX 3.1
Rated output (W)750 W continuous; +12V rated 62.5 A / 750 W850 W
Efficiency rating (80 Plus or Cybenetics)80 PLUS Platinum; Cybenetics Efficiency Platinum; Cybenetics Noise A-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%
Form factor (ATX or SFX) and ATX 3.x / PCIe 5.x supportSFX, 100x125x63.5 mmATX 3.1, 150 x 86 x 160 mm
Modular cabling (fully, semi or non-modular)Fully modular, Type-5 Micro-Fit connectorsFully modular
Graphics card connectors (12V-2x6 / 12VHPWR and PCIe 8-pin count)1x 12VHPWR (12+4-pin) 400 mm; 2x PCIe 8-pin (6+2) 400 mm; 8 SATA, 3 PATA, 2 EPS1x 16-pin 12V-2x6 (rated up to 600 W per NZXT) and 3x 8-pin (6+2) PCIe
Fan size and zero-fan mode92 mm PWM, fluid dynamic bearing, Zero RPM mode135 mm fluid dynamic bearing, PWM, 2,300 RPM ±10%, maximum noise 44.5 dBA, Zero RPM mode; silent below 50% load
Warranty (years)7 years10 years

Strengths and weaknesses

Corsair SF750 SFX Fully Modular 80 PLUS Platinum

  • + 80 PLUS Platinum with 95% reported at 400 W
  • + Native 12VHPWR cable and ATX 3.1 compliance
  • + Low ripple and quiet running praised by reviewers
  • − Fan becomes audible under heavy load, owners say
  • − Only two PCIe 8-pin cables supplied
  • − Hold-up time called weak in one review

Skip it if:

  • Buyers building a multi-GPU or high-draw system needing many PCIe 8-pin connectors.
  • Anyone who wants silence even when the system runs near full load for long periods.
  • Buyers who need the strongest hold-up time for unstable mains conditions.
Read the full Corsair SF750 SFX Fully Modular 80 PLUS Platinum review ›

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 ›

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