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be quiet! Pure Power 12 750W (BP003EU) 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 be quiet! Pure Power 12 750W (BP003EU) at 6.6/10.

The be quiet! Pure Power 12 750W (BP003EU) leads on noise.

The Corsair RMx Series RM1000x Fully Modular Power Supply leads on quality and protections, efficiency and cabling and connectors.

They score the same on warranty.

The biggest difference is cabling and connectors, where the Corsair RMx Series RM1000x Fully Modular Power Supply scores 8/10 to the be quiet! Pure Power 12 750W (BP003EU)'s 4/10.

be quiet! Pure Power 12 750W (BP003EU)

6.6/10verdict: good, not the best

This is a 750W ATX 3.1 power supply for a single-GPU desktop where low noise and a long warranty matter more than cable tidiness. It suits builders who want a native 12V-2x6 connector and Gold efficiency and are happy with fixed cabling. It is a poor fit for multi-GPU builds or cases that need a minimal cable count.

Typically about £89.99 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

CriterionWeightbe quiet! Pure Power 12 750W (BP003EU)Corsair RMx Series RM1000x Fully Modular Power Supply
Quality and protections30%6/107/10
Efficiency20%7/108/10
Cabling and connectors20%4/108/10
Noise15%7/106/10
Warranty15%10/1010/10
Overall6.6/107.7/10

Specifications

Specbe quiet! Pure Power 12 750W (BP003EU)Corsair RMx Series RM1000x Fully Modular Power Supply
Rated output (W)750W continuous, 820W peak; single 12V rail, 62.5A on +12V1, max combined 12V 750W1000W continuous
Efficiency rating (80 Plus or Cybenetics)80 PLUS Gold, up to 92.8%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, ATX 3.1 compliant, PCIe 5.1 compatibleATX, 160x150x86 mm (Corsair); 150x85x160 mm (Hardware Busters)
Modular cabling (fully, semi or non-modular)Not modular (fixed cables)Fully modular, Type-4 cables
Graphics card connectors (12V-2x6 / 12VHPWR and PCIe 8-pin count)1 x PCIe 5.1 12V-2x6 (600W), 3 x PCIe 6+2-pin, 1 x 20+4-pin motherboard, 1 x P8 (8-pin CPU), 1 x P4+4 CPU, 6 x SATA, 1 x PATA, 8 cables total1x PCIe 12V-2x6 (12+4), 4x PCIe 8-pin (6+2), 2x EPS 8-pin, 12x SATA, 6x PATA
Fan size and zero-fan mode120mm be quiet! rifle bearing fan, 1800 rpm max, 4-pole motor; 8.7 dB(A) at 10% and 20% load, 8.8 dB(A) at 50%, 22.5 dB(A) at 100%1x 140mm fluid dynamic bearing fan with Zero RPM mode and manual override knob
Warranty (years)10 years10 years

Strengths and weaknesses

be quiet! Pure Power 12 750W (BP003EU)

  • + 10-year warranty
  • + Native 12V-2x6 cable, ATX 3.1
  • + Quiet fan: 8.7 dB(A) up to 20% load
  • − Non-modular, fixed cables
  • − Only three PCIe 6+2-pin connectors
  • − 68.4% efficiency at 2% load

Skip it if:

  • Builders who want fully modular cabling to keep a small case tidy.
  • Anyone running several graphics cards that need many 8-pin PCIe connectors.
Read the full be quiet! Pure Power 12 750W (BP003EU) 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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