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Corsair RMe Series RM850e vs Seasonic FOCUS GX-850 ATX 3 (2024)

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

all judged against power supplies at a similar price

The Corsair RMe Series RM850e scores 7.0/10 overall, ahead of the Seasonic FOCUS GX-850 ATX 3 (2024) at 6.8/10.

The Corsair RMe Series RM850e leads on quality and protections and noise.

The Seasonic FOCUS GX-850 ATX 3 (2024) leads on efficiency and warranty.

They score the same on cabling and connectors.

The biggest difference is noise, where the Corsair RMe Series RM850e scores 8/10 to the Seasonic FOCUS GX-850 ATX 3 (2024)'s 5/10.

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-850 ATX 3 (2024)

6.8/10verdict: good, not the best

The Seasonic FOCUS GX-850 ATX 3 (2024) is for builders who want a fully modular 850 W unit with a native 12V-2x6 cable for a current graphics card. It suits buyers who value a 10-year warranty and strong efficiency figures on 230V mains. It is a weaker fit for anyone who puts tight voltage regulation or a consistently quiet fan first.

Typically about £144.95 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-850 ATX 3 (2024)
Quality and protections30%7/105/10
Efficiency20%6/108/10
Cabling and connectors20%7/107/10
Noise15%8/105/10
Warranty15%7/1010/10
Overall7.0/106.8/10

Specifications

SpecCorsair RMe Series RM850eSeasonic FOCUS GX-850 ATX 3 (2024)
Rated output (W)850W850 W
Efficiency rating (80 Plus or Cybenetics)Cybenetics Gold80 PLUS Gold
Form factor (ATX or SFX) and ATX 3.x / PCIe 5.x supportATXATX
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 EPS1x 12V-2x6 (native); 1x PCIe 12+4 pin (600W) per Hardware Busters; 3x PCIe 6+2 pin; 8x SATA; 3x Molex
Fan size and zero-fan mode120mm rifle-bearing fan135 mm fluid dynamic bearing fan; semi-passive mode (selectable)
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-850 ATX 3 (2024)

  • + 10-year warranty, praised by owners
  • + Cybenetics Platinum efficiency despite the Gold label
  • + Fully modular with native 12V-2x6 cable
  • − Loose 12V load regulation per Hardware Busters
  • − Fan curve complaints; spins up early for some owners
  • − Cables reported as bulky or short

Skip it if:

  • Buyers who put tight 12 V voltage regulation first
  • Builders who need a consistently silent fan at low load
  • Anyone with a compact case who needs long, flexible cables
Read the full Seasonic FOCUS GX-850 ATX 3 (2024) review ›

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