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Cooler Master MWE Gold 850 V3 ATX 3.1 vs Corsair RM1000x SHIFT (2025)

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

all judged against power supplies at a similar price

The Corsair RM1000x SHIFT (2025) scores 7.8/10 overall, ahead of the Cooler Master MWE Gold 850 V3 ATX 3.1 at 7.5/10.

The Corsair RM1000x SHIFT (2025) leads on noise.

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

Cooler Master MWE Gold 850 V3 ATX 3.1

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 itCheck price at Amazon UK (opens in a new tab, affiliate link)

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

Corsair RM1000x SHIFT (2025)

Corsair RM1000x SHIFT (2025)

7.8/10verdict: buy

The RM1000x SHIFT (2025) suits builders putting together a high-end gaming or workstation PC with a current NVIDIA card. It offers 1000W, a native 12V-2x6 cable and a side-mounted modular connector layout. It fits people who want a quiet, long-warranty supply and have case space for the side connectors.

Typically about £129.99 in the UK when we researched itCheck price at 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

CriterionWeightCooler Master MWE Gold 850 V3 ATX 3.1Corsair RM1000x SHIFT (2025)
Quality and protections30%7/107/10
Efficiency20%7/107/10
Cabling and connectors20%8/108/10
Noise15%6/108/10
Warranty15%10/1010/10
Overall7.5/107.8/10

Specifications

SpecCooler Master MWE Gold 850 V3 ATX 3.1Corsair RM1000x SHIFT (2025)
Rated output (W)850 W1000W combined (+12V 83.3A, 1000W total)
Efficiency80 PLUS GoldCybenetics Gold
Form factorATX 3.1ATX, ATX 3.1 certified, PCIe 5.1 compliant
CablingFully modularFully modular
GPU power1x 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-pinOne native 12V-2x6 cable; PCIe 8-pin counts differ by source; SATA 12 (Tech2Geek) or 16 (Corsair white SKU page)
Fan size and zero-fan mode120 mm, HDB bearing, rated 2500 RPM, zero-RPM mode140mm fluid dynamic bearing fan, model NR140HP, with Zero RPM mode
Warranty (years)10 years10 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 RM1000x SHIFT (2025)

  • + Quiet running with Zero RPM fan mode
  • + Native 12V-2x6 cable and fully modular design
  • + 10-year warranty
  • − LTT Labs lists under-voltage protection as absent
  • − Side connectors need 30mm clearance to the side panel

Skip it if:

  • Builders whose case has less than 30mm between the PSU and side panel.
  • Buyers who want under-voltage protection on the spec sheet.
  • Anyone with a low-power or always-on system that doesn't need 1000W.
Read the full Corsair RM1000x SHIFT (2025) review ›

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