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Corsair RMe Series RM850e 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 Corsair RMe Series RM850e at 7.0/10.

The Corsair RMe Series RM850e leads on noise.

The Seasonic FOCUS GX-750 ATX 3.1 leads on efficiency and 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 RMe Series RM850e's 7/10.

Corsair RMe Series RM850e

Corsair RMe Series RM850e

7.0/10verdict: good, not the best

The Corsair RM850e is an 850W ATX power supply for people building or upgrading a quiet desktop or workstation. It suits buyers who want a fully modular unit with a native 12V-2x6 cable and a seven-year warranty. It is less suited to builds that need many PCIe 8-pin cables or a low-load, always-on setup.

Typically about £94.99 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

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 RMe Series RM850eSeasonic FOCUS GX-750 ATX 3.1
Quality and protections30%7/107/10
Efficiency20%6/107/10
Cabling and connectors20%7/107/10
Noise15%8/106/10
Warranty15%7/1010/10
Overall7.0/107.3/10

Specifications

SpecCorsair RMe Series RM850eSeasonic FOCUS GX-750 ATX 3.1
Rated output (W)850W750 W
Efficiency rating (80 Plus or Cybenetics)Cybenetics Gold80 PLUS Gold; Cybenetics Platinum listed on v5 page
Form factor (ATX or SFX) and ATX 3.x / PCIe 5.x supportATXATX/EPS, 140 mm depth
Modular cabling (fully, semi or non-modular)Fully modularFully modular
Graphics card connectors (12V-2x6 / 12VHPWR and PCIe 8-pin count)2 x PCIe 8-pin (6+2), 1 x 12V-2x6, 2 x 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 mode120mm rifle-bearing fan135 mm fluid dynamic bearing, Digital Hybrid Fan Control
Warranty (years)7 years10 years

Strengths and weaknesses

Corsair RMe Series RM850e

  • + Quiet: 22.81 dBA average and consistent owner praise
  • + Fully modular with a native 12V-2x6 cable
  • + Ripple and regulation measured well by independent reviewers
  • − Only two PCIe 8-pin connectors
  • − Efficiency drops below 70% at 2% load, owners report
  • − Standard cable has no OTP; owners report 3.3V droop

Skip it if:

  • Builders who need more than two PCIe 8-pin connectors for multiple GPUs.
  • Buyers running a near-idle, always-on machine where efficiency at 2% load matters.
  • Anyone who wants over-temperature protection on the standard cable.
Read the full Corsair RMe Series RM850e 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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