Corsair CX650 650W 80 PLUS Bronze ATX PSU vs Corsair RMe Series RM750e

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

all judged against power supplies at a similar price

The Corsair RMe Series RM750e scores 7.2/10 overall, ahead of the Corsair CX650 650W 80 PLUS Bronze ATX PSU at 5.3/10.

The Corsair RMe Series RM750e leads on quality and protections, efficiency, cabling and connectors, noise and warranty.

The biggest difference is cabling and connectors, where the Corsair RMe Series RM750e scores 8/10 to the Corsair CX650 650W 80 PLUS Bronze ATX PSU's 4/10.

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

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Corsair RMe Series RM750e

7.2/10verdict: good, not the best

The RM750e is for people building a single-GPU desktop who want a fully modular ATX 3.1 power supply with a native 12V-2x6 cable. It suits builders who value a quiet fan that stays off at idle and a 7-year warranty. It is a weaker fit for machines that idle around the clock, where owners report poor low-load efficiency.

Typically about £89.99 in the UK when we researched itSearch Amazon UK

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

Scores, criterion by criterion

Criterion	Weight	Corsair CX650 650W 80 PLUS Bronze ATX PSU	Corsair RMe Series RM750e
Quality and protections	30%	6/10	7/10
Efficiency	20%	5/10	6/10
Cabling and connectors	20%	4/10	8/10
Noise	15%	5/10	8/10
Warranty	15%	6/10	7/10
Overall		5.3/10	7.2/10

Specifications

Spec	Corsair CX650 650W 80 PLUS Bronze ATX PSU	Corsair RMe Series RM750e
Rated output (W)	650 W continuous	750 W continuous; +12V rail rated 62.5 A
Efficiency rating (80 Plus or Cybenetics)	80 PLUS Bronze	Cybenetics Gold; up to 89% overall efficiency (manufacturer claim)
Form factor (ATX or SFX) and ATX 3.x / PCIe 5.x support	ATX (ATX12V v2.31; ATX 3.x not stated)	ATX; ATX 3.1 certified; PCIe 5.1 compatible
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 12VHPWR	One native 12V-2x6 (12+4) cable, 650 mm; one 12V-2x6 to dual PCIe 8-pin adapter-style cable; one PCIe 8-pin (6+2) cable (three PCIe 8-pin outputs in total); two EPS 8-pin; six SATA
Fan size and zero-fan mode	120mm sleeve bearing, thermally controlled; zero-RPM mode not stated	120 mm rifle-bearing fan; Zero RPM mode
Warranty (years)	5 years	7 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 RM750e

+ Native 12V-2x6 cable on a fully modular unit
+ Fan stays off at idle; Cybenetics noise rating A
+ Seven-year warranty with all main protections listed
− Owners report weak low-load efficiency
− Some reviewers raise ripple and transient response concerns
− Owners call the MSRP uncompetitive

Skip it if:

Anyone building an always-on server or low-power PC that idles most of the time.
Buyers who need many SATA connectors for a large drive array.
Buyers who want the lowest ripple and the strongest transient response.

Read the full Corsair RMe Series RM750e review ›

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