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Corsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply vs MSI MAG A850GL PCIE5

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 MSI MAG A850GL PCIE5 at 6.3/10.

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

The MSI MAG A850GL PCIE5 leads on cabling and connectors.

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

MSI MAG A850GL PCIE5

MSI MAG A850GL PCIE5

6.3/10verdict: good, not the best

The MSI MAG A850GL PCIE5 suits builders putting together a modern gaming PC who want a fully modular 850W Gold supply with a native 16-pin cable. It fits those who value cable management, quiet running under load and PCIe 5 support. It is less suited to always-on machines that idle at very low loads.

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

Scores, criterion by criterion

CriterionWeightCorsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power SupplyMSI MAG A850GL PCIE5
Quality and protections30%7/106/10
Efficiency20%8/106/10
Cabling and connectors20%7/108/10
Noise15%7/106/10
Warranty15%7/105/10
Overall7.2/106.3/10

Specifications

SpecCorsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power SupplyMSI MAG A850GL PCIE5
Rated output (W)1000 W rated continuous output; +12V rail 83.3 A; +3.3V and +5V 150 W each; +5VSB 15 W850W rated output
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)80 PLUS Gold, up to 90%
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
Modular cabling (fully, semi or non-modular)Fully modularYes, full modular
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)1 x PCI-E 5.0 16-pin rated 600W, 4 x PCI-E 6+2 pin, 8 x SATA, 4 x peripheral (Molex), 1 x FDD, 2 x EPS 4+4, 1 x ATX 24-pin
Fan size and zero-fan mode120 mm rifle-bearing fan with zero-RPM mode (fan off at low and moderate loads, per Corsair)120mm fluid dynamic bearing fan
Warranty (years)7 yearsnot listed

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 ›

MSI MAG A850GL PCIE5

  • + Native 600W 16-pin cable included
  • + Fully modular with plenty of PCIe and SATA connectors
  • + Six listed protections on a CWT GPX platform
  • − Efficiency reported below 70% at 2% load
  • − 3.3V OCP trigger set too high, per Hardware Busters
  • − Some owners report fan noise or faults after months

Skip it if:

  • Buyers building an always-on PC that idles at very low load.
  • Anyone fitting a small case who wants flexible, easy-to-route flat cables.
  • Buyers who want the strictest overcurrent protection on the 3.3V rail.
Read the full MSI MAG A850GL PCIE5 review ›

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