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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.

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The short answer

Thermaltake Toughpower GF3 850W comes out ahead by a clear margin (4.2 vs 3.0). Thermaltake Toughpower GF3 850W is best for: Users prioritizing efficiency and warranty over noise control. Read the strengths below before deciding.

Seasonic Focus GX-850
Ranked #7 in Best 850w Power Supplies
Seasonic Focus GX-850
1 sourceall derived$159.99as of Oct 21

The Seasonic Focus GX-850 is a compact, fully modular 850W power supply designed for modern systems with ATX v3.1 and PCIe 5.1 support. It features a 10-year warranty and efficient operation with 80+ Gold certification. However, some users have reported fan noise issues, particularly under light load gaming conditions. This PSU is ideal for mid-tower builds and high-performance systems requiring reliable power delivery.

Strengths
  • — Fully modular design with 80+ Gold efficiency
  • — Compact dimensions (140mm depth) suitable for mid-towers, per HWBusters
  • — 10-year warranty support
Watch-outs
  • — May be too loud during GPU-intensive tasks
$159.99 · Check Price on AmazonFull review →
Thermaltake Toughpower GF3 850W
Higher ratedRanked #4 in Best 850w Power Supplies
Thermaltake Toughpower GF3 850W
1 source$123.99as of Oct 11

The Thermaltake Toughpower GF A3 850W is a high-end PSU with Platinum efficiency certification and full ATX v3.0/PCIe 5.0 compatibility. It features a 160mm depth design, fully modular cabling, and semi-passive operation. It offers excellent efficiency and a decade-long warranty, and Tom's Hardware lists a 135mm fluid dynamic bearing fan.

Strengths
  • — Platinum certified efficiency rating of 89-91% at 115V
  • — 10-year warranty coverage, per Tom's Hardware
  • — Supports ATX v3.0 and PCIe 5.0 standards with 12VHPWR connector
Watch-outs
  • — Fan becomes more noticeable at around 70% load
$123.99 · Check Price on AmazonFull 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.

How they stack up

Seasonic Focus GX-850

The Seasonic Focus GX-850 is more compact than the Corsair RM850x but suffers from excessive fan noise under light loads, unlike the Corsair's fluid dynamic bearing fan. It matches the EVGA SuperNOVA 850 G7 in 10-year warranty and efficiency, but lacks the latter's Japanese capacitors and superior fan control features.

Thermaltake Toughpower GF3 850W

The Thermaltake Toughpower GF3 850W offers Platinum efficiency and a 10-year warranty, and, like the Corsair RM850x and EVGA SuperNOVA 850 G7, it uses a fluid dynamic bearing fan (135mm, per Tom's Hardware). It's less efficient than the be quiet! Dark Power Pro 12 850W and lacks the premium features of the ASUS ROG Strix 850G Aura.

Specs side-by-side

SpecSeasonic Focus GX-850Thermaltake Toughpower GF3 850W
Wattage850W850W
Efficiency80+ GoldPlatinum (89-91%)
ModularityFully modularFully modular
Form FactorCompactATX 3.1
Fan Type135mm Fluid Dynamic Bearing Fan135mm Fluid Dynamic Bearing
Warranty10-year10 years
Dimensions150 mm x 85 mm x 140mm150mm(W) x 86mm(H) x 160mm(D)
Connectors2x EPS, 3x PCIe 6+2 pin, 1x PCIe 12+4 pin, 8x SATA, 3x 4-pin MolexPCIe 6+2Pin X 4, PCIe 12+4Pin X 1
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