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 clear margin (4.5 vs 4.1). Corsair RM850x is best for: Enthusiasts seeking long-term reliability and quiet operation. Read the strengths below before deciding.

Ranked #5 in Best 850w Power Supplies

Cooler Master MWE Gold 850 V2

4.1

2 sources$99.99as of Oct 11

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 cited reviews. 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

— No native 12VHPWR connector and no zero-RPM fan mode

$99.99 · Check Price on Amazon Full review →

Higher ratedRanked #1 in Best 850w Power Supplies

Corsair RM850x

4.5

3 sources$139.99as of Oct 11

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, per KitGuru

Watch-outs

— Fan speed control knob requires manual adjustment under light loads

$139.99 · Check Price on Amazon Full review →

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	120mm HDB fan	140mm FDB

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