Head-to-head · Best 850w Power Supplies

Corsair HX850 vs EVGA SuperNOVA 850 G6

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 HX850 comes out ahead by a clear margin (4.6 vs 4.0). The gap is mostly about fit for purpose — read the strengths below before deciding.

Higher ratedRanked #2 in Best 850w Power Supplies

Corsair HX850

4.6

3 sources2 derived$311as of Aug 1

The Corsair HX850 is an 80 Plus Platinum, fully modular 850W unit whose defining trait is silence: ZeroRPM keeps the 135mm fan stopped until load demands it. KitGuru points to the Japanese 105°C capacitors and the build quality behind the ten-year warranty, and PC Perspective's bench work found voltage regulation on the main rails inside tight tolerances. The complaints are practical rather than electrical — thick ATX, EPS and PCIe cables that fight small cases, and over-current protection behaviour on the 5VSB rail. It suits a quiet high-end build where cable room is not the constraint.

Strengths

— Full power at 46°C ambient temperature
— 90% efficiency at real-world load conditions
— ZeroRPM mode for fanless operation at low loads

Watch-outs

— OCP at 5VSB
— Bulky ATX, EPS and PCIe cables

$311 · Buy at newegg.com Full review →

Ranked #5 in Best 850w Power Supplies

EVGA SuperNOVA 850 G6

4.0

3 sources2 derived$269.99as of Jun 28

Tom's Hardware found the EVGA SuperNOVA 850 G6, an 850W unit, performs well and is put together well. It's fully modular, compact, and holds voltage steady, though reviewers took issue with the fan behavior and with efficiency at typical loads. A 10-year warranty backs it, and it works in high-end builds. The problem is the company it keeps: this class is crowded.

Strengths

— Full power at 47 degrees Celsius
— Good build quality
— Tight load regulation at 12V

Watch-outs

— Fan speed profile could be smoother
— Efficiency at normal and light loads could be higher
— High inrush current with 230V

$269.99 · 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.

Specs side-by-side

Spec	Corsair HX850	EVGA SuperNOVA 850 G6
Wattage	850W	850 W
Efficiency	80 Plus Platinum	91% or higher (under typical load)
Form Factor	ATX	ATX Form Factor
Modularity	Fully Modular	Fully modular
Fan Size	135mm fluid dynamic bearing	1 x 135 mm
Warranty	10 years	—
Compliance	ATX12V v2.4 and EPS 2.92 standards	ATX12V / EPS12V
Connectors	2x EPS, 6x PCIe 6+2 pin, 16 SATA, 1x FDD, 1x ATX	—

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