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Corsair CX650 650W 80 PLUS Bronze ATX PSU vs Corsair RMe Series RM850e

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 Corsair CX650 650W 80 PLUS Bronze ATX PSU at 5.3/10.

The Corsair RMe Series RM850e leads on quality and protections, efficiency, cabling and connectors, noise and warranty.

The biggest difference is cabling and connectors, where the Corsair RMe Series RM850e scores 7/10 to the Corsair CX650 650W 80 PLUS Bronze ATX PSU's 4/10.

Corsair CX650 650W 80 PLUS Bronze ATX PSU

Corsair CX650 650W 80 PLUS Bronze ATX PSU

5.3/10verdict: good, not the best

The Corsair CX650 is a 650W ATX power supply with fixed cabling and 80 PLUS Bronze efficiency. It suits a single-GPU desktop or a small server with a few drives. It is less suited to builds that need modular cabling, a native 12V-2x6 cable or high efficiency.

Typically about £44.99 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

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

Scores, criterion by criterion

CriterionWeightCorsair CX650 650W 80 PLUS Bronze ATX PSUCorsair RMe Series RM850e
Quality and protections30%6/107/10
Efficiency20%5/106/10
Cabling and connectors20%4/107/10
Noise15%5/108/10
Warranty15%6/107/10
Overall5.3/107.0/10

Specifications

SpecCorsair CX650 650W 80 PLUS Bronze ATX PSUCorsair RMe Series RM850e
Rated output (W)650 W continuous850W
Efficiency rating (80 Plus or Cybenetics)80 PLUS BronzeCybenetics Gold
Form factor (ATX or SFX) and ATX 3.x / PCIe 5.x supportATX (ATX12V v2.31; ATX 3.x not stated)ATX
Modular cabling (fully, semi or non-modular)No (non-modular)Fully modular
Graphics card connectors (12V-2x6 / 12VHPWR and PCIe 8-pin count)2 PCIe 8-pin (6+2) on one cable; 3 SATA on one cable; 2 PATA 4-pin; no 12V-2x6 or 12VHPWR2 x PCIe 8-pin (6+2), 1 x 12V-2x6, 2 x EPS
Fan size and zero-fan mode120mm sleeve bearing, thermally controlled; zero-RPM mode not stated120mm rifle-bearing fan
Warranty (years)5 years7 years

Strengths and weaknesses

Corsair CX650 650W 80 PLUS Bronze ATX PSU

  • + 5-year warranty
  • + 12V ripple of 48.6 mV at full load, within the limit
  • + Compact 125mm body
  • − Non-modular cabling
  • − No 12V-2x6 or 12VHPWR connector
  • − 80 PLUS Bronze efficiency only

Skip it if:

  • Buyers whose graphics card needs a native 12V-2x6 or 12VHPWR cable
  • Anyone wanting modular cabling for a tidy build
  • Builders with many SATA drives or high-efficiency needs for an always-on PC
Read the full Corsair CX650 650W 80 PLUS Bronze ATX PSU review ›

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 ›

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