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Corsair RMx Series RM1000x Fully Modular Power Supply vs MSI MAG A750GL PCIE5

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 MSI MAG A750GL PCIE5 at 6.4/10.

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

The biggest difference is warranty, where the Corsair RMx Series RM1000x Fully Modular Power Supply scores 10/10 to the MSI MAG A750GL PCIE5's 7/10.

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

MSI MAG A750GL PCIE5

MSI MAG A750GL PCIE5

6.4/10verdict: good, not the best

The MSI MAG A750GL PCIE5 is for anyone building or upgrading a mid-range gaming or general-purpose PC who wants a fully modular 750W supply with a native 16-pin graphics cable. It suits systems with one mainstream graphics card and a few drives. It is a weaker fit for silent builds or for the most power-hungry graphics cards.

Typically about £79.99 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

Scores, criterion by criterion

CriterionWeightCorsair RMx Series RM1000x Fully Modular Power SupplyMSI MAG A750GL PCIE5
Quality and protections30%7/106/10
Efficiency20%8/107/10
Cabling and connectors20%8/107/10
Noise15%6/105/10
Warranty15%10/107/10
Overall7.7/106.4/10

Specifications

SpecCorsair RMx Series RM1000x Fully Modular Power SupplyMSI MAG A750GL PCIE5
Rated output (W)1000W continuous750W rated output
Efficiency rating (80 Plus or Cybenetics)Measured Cybenetics Platinum: 89-91% at 115V, 91-93% at 230V (Hardware Busters)80 PLUS Gold, up to 90%; Cybenetics Gold icon on MSI product page
Form factor (ATX or SFX) and ATX 3.x / PCIe 5.x supportATX, 160x150x86 mm (Corsair); 150x85x160 mm (Hardware Busters)ATX, 140 × 150 × 86 mm
Modular cabling (fully, semi or non-modular)Fully modular, Type-4 cablesFully modular
Graphics card connectors (12V-2x6 / 12VHPWR and PCIe 8-pin count)1x PCIe 12V-2x6 (12+4), 4x PCIe 8-pin (6+2), 2x EPS 8-pin, 12x SATA, 6x PATA1x native 16-pin PCIe 5.x (450W, 12V-2x6 style), 3x PCIe 6+2-pin, 8x SATA, 4x Molex, 1x FDD, 2x EPS 4+4
Fan size and zero-fan mode1x 140mm fluid dynamic bearing fan with Zero RPM mode and manual override knob120mm fluid dynamic bearing, 500–1800 RPM
Warranty (years)10 years7 years (MSI UK store)

Strengths and weaknesses

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 ›

MSI MAG A750GL PCIE5

  • + Fully modular with a native 450W 16-pin cable
  • + 80 PLUS Gold rating with a seven-year UK warranty
  • + Owners describe it as quiet, stable and reliable
  • − Owners report whine and ticking from the fan at idle
  • − 750W is tight for RTX 4090 builds, per one owner
  • − Zero-RPM fan behaviour is reported inconsistently

Skip it if:

  • Anyone building a silent PC who needs the fan fully off at idle
  • Buyers planning an RTX 4090 or similarly power-hungry graphics card
  • Buyers who need a confirmed ATX 3.1 certification
Read the full MSI MAG A750GL PCIE5 review ›

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