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Corsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply 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 Corsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply at 7.2/10.

The Corsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply leads on noise.

The Corsair RMx Series RM1000x Fully Modular Power Supply leads on cabling and connectors and warranty.

They score the same on quality and protections and efficiency.

The biggest difference is warranty, where the Corsair RMx Series RM1000x Fully Modular Power Supply scores 10/10 to the Corsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply's 7/10.

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

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 (opens in a new tab, affiliate link)

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

Corsair RMx Series RM1000x Fully Modular Power Supply

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 (opens in a new tab, affiliate link)

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

Scores, criterion by criterion

CriterionWeightCorsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power SupplyCorsair RMx Series RM1000x Fully Modular Power Supply
Quality and protections30%7/107/10
Efficiency20%8/108/10
Cabling and connectors20%7/108/10
Noise15%7/106/10
Warranty15%7/1010/10
Overall7.2/107.7/10

Specifications

SpecCorsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power SupplyCorsair RMx Series RM1000x Fully Modular Power Supply
Rated output (W)1000 W rated continuous output; +12V rail 83.3 A; +3.3V and +5V 150 W each; +5VSB 15 W1000W continuous
Efficiency rating (80 Plus or Cybenetics)80 PLUS Gold and Cybenetics Gold per Corsair; Hardware Busters measured Cybenetics Platinum (89.483% at 115 V, 91.576% at 230 V)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 supportATX, 140 x 150 x 86 mm; ATX 3.1 certified; PCIe 5.1 compliantATX, 160x150x86 mm (Corsair); 150x85x160 mm (Hardware Busters)
Modular cabling (fully, semi or non-modular)Fully modularFully modular, Type-4 cables
Graphics card connectors (12V-2x6 / 12VHPWR and PCIe 8-pin count)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)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 mode120 mm rifle-bearing fan with zero-RPM mode (fan off at low and moderate loads, per Corsair)1x 140mm fluid dynamic bearing fan with Zero RPM mode and manual override knob
Warranty (years)7 years10 years

Strengths and weaknesses

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 ›

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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