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Head-to-head · Best 850w Power Supplies

EVGA SuperNOVA 850 G6 vs Seasonic Focus PX-850

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

Seasonic Focus PX-850 comes out ahead by a clear margin (4.0 vs 4.9). The gap is mostly about fit for purpose — read the strengths below before deciding.

EVGA SuperNOVA 850 G6
Ranked #5 in Best 850w Power Supplies
EVGA SuperNOVA 850 G6
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 AmazonFull review →
Seasonic Focus PX-850
Higher ratedRanked #1 in Best 850w Power Supplies
Seasonic Focus PX-850
3 sources$413as of Aug 1

The Seasonic Focus PX-850 is a Platinum-rated 850W unit that runs efficiently and holds up over time. RelaxedTech praised the fully modular design, the high-grade Japanese capacitors, and the Fluid Dynamic Bearing fan with customizable cooling modes. A single +12V rail handles 70A, and the 10-year warranty puts it ahead of most competitors. At around $140 the price is competitive but still above budget alternatives. Enthusiasts and professionals who want premium build quality and long-term reliability should buy; budget-conscious users can find better value.

Strengths
  • — 80+ Platinum efficiency rating with 92% efficiency at 50% load
  • — Fully modular design with flat black cables for improved airflow
  • — Fluid Dynamic Bearing (FDB) fan with three operational stages: Fanless, Silent, and Cooling Mode
Watch-outs
  • — Price is still higher than budget Gold-class alternatives, even though it undercuts rival Platinum units by $20-$40
  • — Small 140mm footprint may not fit all cases with tight space constraints
$413 · Buy at newegg.caFull 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

SpecEVGA SuperNOVA 850 G6Seasonic Focus PX-850
Wattage850 W850W
Efficiency91% or higher (under typical load)80+ Platinum
ModularityFully modularFully Modular
Fan Size1 x 135 mm120mm FDB
ComplianceATX12V / EPS12VEnergy Star, RoHS, WEEE, ErP Lot 6, REACH
Form FactorATX Form FactorIntel ATX 12 V
Warranty—10 Years
Connectors—20+4Pin, 2 x 4/8 Pin CPU, 6 x 6+2 pin PCIe, 10 x SATA
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