Head-to-head · Best 850w Power Supplies

Corsair RM850x vs EVGA SuperNOVA 850 G7

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

EVGA SuperNOVA 850 G7 comes out ahead by a narrow margin (4.4 vs 4.5). The gap is mostly about Gaming enthusiasts seeking high-efficiency and reliability — read the strengths below before deciding.

Ranked #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 →

Higher ratedRanked #1 in Best 850w Power Supplies

EVGA SuperNOVA 850 G7

4.5

5 sources1 derived

Tom's Hardware reviewed the EVGA SuperNOVA 850 G7 as an 80 Plus Gold certified power supply delivering 92% efficiency or higher under typical loads. The unit features 100% Japanese capacitors, full modularity for improved airflow, and a fluid dynamic bearing fan with Eco mode for quiet operation and longevity. EVGA backs it with a 10-year limited warranty, positioning it as a reliable choice for gaming rigs, content creation workstations, or general builds requiring stable power delivery. This PSU is ideal for users seeking high-quality, efficient power with extended warranty coverage.

Strengths

— 80 Plus Gold certified with 92% efficiency or higher under typical loads
— 100% Japanese capacitors for top-notch reliability and performance
— Fully modular design for improved airflow and reduced cable clutter

Watch-outs

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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

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.

EVGA SuperNOVA 850 G7

The EVGA SuperNOVA 850 G7 outperforms the Corsair RM850x with 100% Japanese capacitors and a more advanced Eco mode, while also offering better efficiency ratings. Unlike the Seasonic Focus GX-850, it avoids fan noise issues and provides a more reliable build quality, though it lacks the 10-year warranty of the Corsair RM850x.

Specs side-by-side

Spec	Corsair RM850x	EVGA SuperNOVA 850 G7
Wattage	850W	850W
Efficiency	90% (Cybenetics Gold Certified)	80 Plus Gold
Modularity	Fully Modular	Fully Modular
Form Factor	ATX 3.1	ATX12V v2.52
Fan Type	140mm FDB	Fluid Dynamic Bearing
Warranty	10 years	10 years
Dimensions	150 mm x 85 mm x 160 mm	150 x 85 x 130mm
Connectors	11 modular sockets including 1x 12V-26	2x EPS, 6x PCIe 6+2 pin, 9 SATA, 4x 4-pin Molex, 1x FDD adapter

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