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.

The short answer

Corsair HX850 comes out ahead by a clear margin (4.6 vs 4.1). The gap is mostly about fit for purpose — read the strengths below before deciding.

Higher ratedRanked #1 in Best 850w Power Supplies

Corsair HX850

4.6

The Corsair HX850 is a high-performance power supply that delivers excellent efficiency and silent operation, particularly at low loads thanks to its ZeroRPM mode. Tom's Hardware praised its ability to maintain full power at 46°C and noted its superior noise reduction compared to competitors like the EVGA 850 G3 and Seasonic FOCUS PLUS. KitGuru highlighted its 80 Plus Platinum certification, fully modular design, and robust build quality. However, reviewers noted some drawbacks including OCP issues at 5VSB and bulky cable configurations. This PSU is ideal for enthusiasts seeking reliable, quiet power delivery but may not suit users prioritizing minimal cable clutter.

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

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Ranked #5 in Best 850w Power Supplies

EVGA SuperNOVA 850 G6

4.1

$269.99as of Jul 8

The EVGA SuperNOVA 850 G6 is a solid 850W power supply that delivers good performance and build quality, according to Tom's Hardware. It features full modularity, a compact design, and strong voltage regulation, though reviewers noted issues with fan behavior and efficiency at typical loads. While it offers a 10-year warranty and is well-suited for high-end builds, it faces stiff competition in its class.

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 →

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	10-year warranty
Connectors	2x EPS, 6x PCIe 6+2 pin, 16 SATA, 1x FDD, 1x ATX	—

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