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Head-to-head · Best 850w Power Supplies

Seasonic Focus PX-850 vs Thermaltake Toughpower GF3 850W

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

Thermaltake Toughpower GF3 850W comes out ahead by a narrow margin (4.1 vs 4.3). The gap is mostly about fit for purpose — read the strengths below before deciding.

Seasonic Focus PX-850
Ranked #7 in Best 850w Power Supplies
Seasonic Focus PX-850
$345as of Jul 8

The Seasonic Focus PX-850 is a high-quality 850W Platinum power supply that delivers excellent efficiency and reliability. Reviewers praised its fully modular design, high-grade Japanese capacitors, and Fluid Dynamic Bearing fan with customizable cooling modes. The unit offers a single +12V rail capable of 70A and comes with a 10-year warranty, setting it apart from competitors. While it's priced competitively at around $140, it remains more expensive than some budget alternatives. This PSU is ideal for enthusiasts and professionals seeking premium build quality and long-term reliability, though budget-conscious users might find better value elsewhere.

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 some budget alternatives despite being $20-$40 cheaper than competitors
  • — Small 140mm footprint may not fit all cases with tight space constraints
$345 · Check Price on AmazonFull review →
Thermaltake Toughpower GF3 850W
Higher ratedRanked #4 in Best 850w Power Supplies
Thermaltake Toughpower GF3 850W
$109.99as of Jul 8

The Thermaltake Toughpower GF A3 850W is a Platinum-certified ATX v3.0 and PCIe 5.0 compatible power supply with a 12VHPWR connector rated at 450W. Hardware Busters praised its efficiency, quiet operation, and fully modular design, though noted the use of sleeve bearing fans instead of fluid dynamic bearings. Tom's Hardware called it one of the first ATX v3.0 PSUs with decent performance and quiet operation, though it lacks peak efficiency and has high inrush current at 230V. This PSU is ideal for users seeking reliable v3.0 compatibility with a 10-year warranty, but those wanting the absolute best in performance or fan quality may want to consider alternatives.

Strengths
  • — ATX v3.0 and PCIe 5.0 compatible with 12VHPWR connector rated at 450W
  • — Fully modular design with 120mm sleeve bearing fan for quiet operation
  • — Semi-passive operation available and selectable
Watch-outs
  • — Uses sleeve bearing fan instead of fluid dynamic bearing fan like higher-tier models
  • — Average transient response at 12V rail
  • — High inrush current with 230V input
$109.99 · Check Price on AmazonFull review →

Specs side-by-side

SpecSeasonic Focus PX-850Thermaltake Toughpower GF3 850W
Wattage850W850W
Efficiency80+ PlatinumPlatinum (89-91%)
Form FactorIntel ATX 12 VATX
ModularityFully ModularFully modular
Fan Size120mm FDB120mm Sleeve Bearing Fan
Warranty10 Years10 years
Connectors20+4Pin, 2 x 4/8 Pin CPU, 6 x 6+2 pin PCIe, 10 x SATAPCIe 6+2Pin X 4, PCIe 12+4Pin X 1
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