Head-to-head · Best 850w Power Supplies

Cooler Master MWE Gold 850 V2 vs Corsair RM850x

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

Corsair RM850x comes out ahead by a narrow margin (4.3 vs 4.4). The gap is mostly about Enthusiasts seeking long-term reliability and quiet operation — read the strengths below before deciding.

Ranked #3 in Best 850w Power Supplies

Cooler Master MWE Gold 850 V2

4.3

4 sources2 derived$97.49as of Aug 15

The Cooler Master MWE Gold 850 V2 is a fully modular power supply with 80 Plus Gold certification, designed for high-performance systems. Tom's Hardware reviewed it as a reliable option for demanding builds, noting its fully modular design and two EPS connectors. The unit features an upgraded fan and comes with a five-year warranty. While reviewers praised its efficiency and build quality, specific drawbacks were not detailed in the sources. This PSU is ideal for enthusiasts and professionals seeking a dependable power solution with modular flexibility and extended warranty coverage.

Strengths

— 80 Plus Gold certified efficiency rating
— Fully modular cable management system
— Includes five-year hardware warranty

Watch-outs

$97.49 · Check Price on Amazon Full review →

Higher ratedRanked #2 in Best 850w Power Supplies

Corsair RM850x

4.4

4 sources1 derived$149.99as of Sep 1

The Corsair RM850x is a high-efficiency, fully modular power supply that meets ATX 3.1 standards with support for PCIe Gen 5 and transient spike resistance. It features a 140mm fluid dynamic bearing fan with adjustable speed control, low noise operation, and a 10-year warranty. The unit includes fully modular cabling with dedicated PCIe and EPS connectors, and it delivers steady power with 90% efficiency. While praised for its build quality and noise performance, some users noted the short distances between peripheral connectors could complicate cable management.

Strengths

— Fully modular design with high-quality cables and dedicated connectors
— 10-year warranty support
— Low noise operation with fluid dynamic bearing fan and zero RPM mode

Watch-outs

— Fan speed control knob requires manual adjustment under light loads
— Short distances between peripheral connectors may cause cable management issues

$149.99 · Check Price on Amazon Full review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

How they stack up

Cooler Master MWE Gold 850 V2

The Cooler Master MWE Gold 850 V2 provides 80 Plus Gold efficiency and two EPS connectors, but lacks the 10-year warranty of the Corsair RM850x and Seasonic Focus GX-850. It's less efficient than the EVGA SuperNOVA 850 G7 and doesn't match the be quiet! Dark Power Pro 12 850W in noise control or build quality, though it does offer a five-year warranty.

Corsair RM850x

The Corsair RM850x stands out with its 10-year warranty and fluid dynamic bearing fan, offering superior noise control compared to the EVGA SuperNOVA 850 G7 which lacks this premium fan technology. Unlike the Seasonic Focus GX-850, it provides better PCIe 5.0 support and a more robust build quality, though it shares similar modular design with the Corsair RM850e.

Specs side-by-side

Spec	Cooler Master MWE Gold 850 V2	Corsair RM850x
Wattage	850 W	850W
Efficiency	80 Plus Gold	90% (Cybenetics Gold Certified)
Form Factor	ATX	ATX 3.1
Warranty	5 years	10 years
Dimensions	160 x 150 x 86 mm	150 mm x 85 mm x 160 mm
Connectors	Fully modular	11 modular sockets including 1x 12V-26
Modularity	Full Modular	Fully Modular
Fan Type	140mm Silent Fan	140mm FDB

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