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Head-to-head · Best 850w Power Supplies

Seasonic Focus GX-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 GX-850
Ranked #6 in Best 850w Power Supplies
Seasonic Focus GX-850

The Seasonic Focus GX-850 V4 delivers full power at 46°C and is ATX v3.1 and PCIe 5.1 ready with high build quality and good ripple suppression. However, reviewers noted it lacks competitive overall performance and has a fan speed profile that needs improvement. TechPowerUp and Hardware Busters both criticized its transient response and efficiency under light loads, while one user on Facebook mentioned returning multiple PSUs before settling on this model. It's best suited for users prioritizing build quality and features over peak performance.

Strengths
  • — Delivered full power at 46°C ATX v3.1 and PCIe 5.1 ready
  • — High build quality with OptiSink technology for better heat dissipation
  • — Good ripple suppression
Watch-outs
  • — Increased MSRP
  • — Not competitive overall performance
  • — Fan speed profile needs improvement
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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 GX-850Thermaltake Toughpower GF3 850W
Wattage850W850W
Efficiency80 PLUS Gold (up to 92%)Platinum (89-91%)
Form FactorATX Form FactorATX
ModularityFull ModularFully modular
Fan Size135mm FDB fan with 3 modes120mm Sleeve Bearing Fan
Warranty10-year limited10 years
Connectors3x 6+2 pin PCIe, 1x 12+4 pin PCIePCIe 6+2Pin X 4, PCIe 12+4Pin X 1
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