Corsair CX650 650W 80 PLUS Bronze ATX PSU vs Corsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply

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

all judged against power supplies at a similar price

The Corsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply scores 7.2/10 overall, ahead of the Corsair CX650 650W 80 PLUS Bronze ATX PSU at 5.3/10.

The Corsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply leads on quality and protections, efficiency, cabling and connectors, noise and warranty.

The biggest difference is efficiency, where the Corsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply scores 8/10 to the Corsair CX650 650W 80 PLUS Bronze ATX PSU's 5/10.

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 RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply

7.2/10verdict: good, not the best

The RM1000e suits builders who want a 1000W ATX 3.1 power supply for a modern high-end graphics card. It fits people who care about low noise at everyday loads and want a native 12V-2x6 cable in the box. It is less suited to buyers who want premium internal components or a generous cable bundle.

Typically about £119.99 in the UK when we researched itSearch Amazon UK

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Scores, criterion by criterion

Criterion	Weight	Corsair CX650 650W 80 PLUS Bronze ATX PSU	Corsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply
Quality and protections	30%	6/10	7/10
Efficiency	20%	5/10	8/10
Cabling and connectors	20%	4/10	7/10
Noise	15%	5/10	7/10
Warranty	15%	6/10	7/10
Overall		5.3/10	7.2/10

Specifications

Spec	Corsair CX650 650W 80 PLUS Bronze ATX PSU	Corsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply
Rated output (W)	650 W continuous	1000 W rated continuous output; +12V rail 83.3 A; +3.3V and +5V 150 W each; +5VSB 15 W
Efficiency rating (80 Plus or Cybenetics)	80 PLUS Bronze	80 PLUS Gold and Cybenetics Gold per Corsair; Hardware Busters measured Cybenetics Platinum (89.483% at 115 V, 91.576% at 230 V)
Form factor (ATX or SFX) and ATX 3.x / PCIe 5.x support	ATX (ATX12V v2.31; ATX 3.x not stated)	ATX, 140 x 150 x 86 mm; ATX 3.1 certified; PCIe 5.1 compliant
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 cable included; 1x 24-pin ATX, 2x EPS 8-pin, 7x SATA, 4x PATA; PCIe 8-pin count disputed across sources (2 to 6)
Fan size and zero-fan mode	120mm sleeve bearing, thermally controlled; zero-RPM mode not stated	120 mm rifle-bearing fan with zero-RPM mode (fan off at low and moderate loads, per Corsair)
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 RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply

+ Native 12V-2x6 cable and fully modular design
+ Tight regulation, low ripple and working protections
+ Quiet at low and moderate loads with zero-RPM mode
− Second-tier capacitors and MOSFETs, per Tom's Hardware
− Owners describe the cable bundle as minimal
− Owners question value against Corsair's own models

Skip it if:

Buyers who want premium-brand capacitors and MOSFETs inside the unit
Builders needing a large cable bundle for many drives or accessories
Anyone who wants ten-year warranty cover

Read the full Corsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply review ›

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