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Corsair SF750 SFX Fully Modular 80 PLUS Platinum 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 Corsair SF750 SFX Fully Modular 80 PLUS Platinum scores 7.4/10 overall, ahead of the Seasonic FOCUS GX-750 ATX 3.1 at 7.3/10.

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

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

They score the same on quality and protections and cabling and connectors.

The biggest difference is warranty, where the Seasonic FOCUS GX-750 ATX 3.1 scores 10/10 to the Corsair SF750 SFX Fully Modular 80 PLUS Platinum's 7/10.

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

Seasonic FOCUS GX-750 ATX 3.1

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 (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 PlatinumSeasonic FOCUS GX-750 ATX 3.1
Quality and protections30%7/107/10
Efficiency20%9/107/10
Cabling and connectors20%7/107/10
Noise15%7/106/10
Warranty15%7/1010/10
Overall7.4/107.3/10

Specifications

SpecCorsair SF750 SFX Fully Modular 80 PLUS PlatinumSeasonic FOCUS GX-750 ATX 3.1
Rated output (W)750 W continuous; +12V rated 62.5 A / 750 W750 W
Efficiency rating (80 Plus or Cybenetics)80 PLUS Platinum; Cybenetics Efficiency Platinum; Cybenetics Noise A-80 PLUS Gold; Cybenetics Platinum listed on v5 page
Form factor (ATX or SFX) and ATX 3.x / PCIe 5.x supportSFX, 100x125x63.5 mmATX/EPS, 140 mm depth
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 EPS2× 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 mode92 mm PWM, fluid dynamic bearing, Zero RPM mode135 mm fluid dynamic bearing, Digital Hybrid Fan Control
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 ›

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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