Cooler Master MWE Gold 850 V3 ATX 3.1 vs Corsair RMx Series RM1000x Fully Modular Power Supply

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

all judged against power supplies at a similar price

The Corsair RMx Series RM1000x Fully Modular Power Supply scores 7.7/10 overall, ahead of the Cooler Master MWE Gold 850 V3 ATX 3.1 at 7.5/10.

The Corsair RMx Series RM1000x Fully Modular Power Supply leads on efficiency.

They score the same on quality and protections, cabling and connectors, noise and warranty.

Cooler Master MWE Gold 850 V3 ATX 3.1

7.5/10verdict: buy

The MWE Gold 850 V3 ATX 3.1 suits builders who want a fully modular 850W power supply with a native 12V-2x6 cable for a gaming or workstation PC. It also fits anyone who values a long warranty and a platform maker with independent measurements behind it. It is less suited to buyers who want a silent PSU under heavy load or very flexible cables.

Typically about £69.99 in the UK when we researched itSearch Amazon UK

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Corsair RMx Series RM1000x Fully Modular Power Supply

7.7/10verdict: buy

The Corsair RM1000x suits builders putting a high-power graphics card into a new ATX system. It also fits drive-heavy workstations and homelab machines that need many SATA connectors. It is a fully modular 1000W unit with a 10-year warranty and a native 12V-2x6 connector.

Typically about £130 in the UK when we researched itSearch Amazon UK

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Scores, criterion by criterion

Criterion	Weight	Cooler Master MWE Gold 850 V3 ATX 3.1	Corsair RMx Series RM1000x Fully Modular Power Supply
Quality and protections	30%	7/10	7/10
Efficiency	20%	7/10	8/10
Cabling and connectors	20%	8/10	8/10
Noise	15%	6/10	6/10
Warranty	15%	10/10	10/10
Overall		7.5/10	7.7/10

Specifications

Spec	Cooler Master MWE Gold 850 V3 ATX 3.1	Corsair RMx Series RM1000x Fully Modular Power Supply
Rated output (W)	850 W	1000W continuous
Efficiency rating (80 Plus or Cybenetics)	80 PLUS Gold	Measured Cybenetics Platinum: 89-91% at 115V, 91-93% at 230V (Hardware Busters)
Form factor (ATX or SFX) and ATX 3.x / PCIe 5.x support	ATX 3.1	ATX, 160x150x86 mm (Corsair); 150x85x160 mm (Hardware Busters)
Modular cabling (fully, semi or non-modular)	Fully modular	Fully modular, Type-4 cables
Graphics card connectors (12V-2x6 / 12VHPWR and PCIe 8-pin count)	1x 12V-2x6, 4x PCIe 8-pin (6+2), 1x 24-pin ATX, 1x EPS 4+4, 1x EPS 8-pin, 6x SATA, 2x peripheral 4-pin	1x PCIe 12V-2x6 (12+4), 4x PCIe 8-pin (6+2), 2x EPS 8-pin, 12x SATA, 6x PATA
Fan size and zero-fan mode	120 mm, HDB bearing, rated 2500 RPM, zero-RPM mode	1x 140mm fluid dynamic bearing fan with Zero RPM mode and manual override knob
Warranty (years)	10 years	10 years

Strengths and weaknesses

Cooler Master MWE Gold 850 V3 ATX 3.1

+ 10-year warranty
+ Fully modular with native 12V-2x6 cable
+ Quiet at low load thanks to zero-RPM mode
− Owners report fan noise at high load

Skip it if:

Buyers who need a near-silent PSU under sustained heavy load.
Builders in tight cases who want flexible, easy-to-route cables.

Read the full Cooler Master MWE Gold 850 V3 ATX 3.1 review ›

Corsair RMx Series RM1000x Fully Modular Power Supply

+ 10-year warranty
+ Native 12V-2x6 plus four PCIe 8-pin and 12 SATA
+ Platinum-level efficiency measured on 230V
− Light-load efficiency is modest, about 74% at 20W
− Some owners report scratchy fan noise near full speed
− Some owners say the fan runs at full speed at desktop

Skip it if:

Buyers building a low-power always-on box who want high efficiency at very light loads
Buyers who need an utterly silent system and are bothered by reports of fan noise
Buyers with a small chassis that cannot take a roughly 160 mm deep ATX unit

Read the full Corsair RMx Series RM1000x Fully Modular Power Supply review ›

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