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Head-to-head · Best 850w Power Supplies

Corsair RM850x 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

Corsair RM850x comes out ahead by a clear margin (4.4 vs 3.4). The gap is mostly about Enthusiasts seeking long-term reliability and quiet operation — read the strengths below before deciding.

Corsair RM850x
Higher ratedRanked #2 in Best 850w Power Supplies
Corsair RM850x
4 sources1 derived$139.99as of Sep 15

The Corsair RM850x is a high-efficiency, fully modular power supply that meets ATX 3.1 standards with support for PCIe Gen 5 and transient spike resistance. It features a 140mm fluid dynamic bearing fan with adjustable speed control, low noise operation, and a 10-year warranty. The unit includes fully modular cabling with dedicated PCIe and EPS connectors, and it delivers steady power with 90% efficiency. While praised for its build quality and noise performance, some users noted the short distances between peripheral connectors could complicate cable management.

Strengths
  • — Fully modular design with high-quality cables and dedicated connectors
  • — 10-year warranty support
  • — Low noise operation with fluid dynamic bearing fan and zero RPM mode
Watch-outs
  • — Fan speed control knob requires manual adjustment under light loads
  • — Short distances between peripheral connectors may cause cable management issues
$139.99 · Check Price on AmazonFull review →
Thermaltake Toughpower GF3 850W
Ranked #8 in Best 850w Power Supplies
Thermaltake Toughpower GF3 850W
4 sources2 derived$123.99as of Sep 15

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 compact 140mm depth design, fully modular cabling, and semi-passive operation. While it offers excellent efficiency and a decade-long warranty, it uses a less premium sleeve bearing fan compared to its 1200W sibling. The unit also includes addressable RGB lighting as a premium feature.

Strengths
  • — Platinum certified efficiency rating of 89-91% at 115V
  • — Fully modular design with 120mm sleeve bearing fan
  • — 10-year warranty coverage
Watch-outs
  • — Uses sleeve bearing fan instead of fluid dynamic bearing fan like higher-tier models
  • — Includes addressable RGB lighting which some users may find unnecessary
$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

Corsair RM850x

The Corsair RM850x stands out with its 10-year warranty and fluid dynamic bearing fan, offering superior noise control compared to the EVGA SuperNOVA 850 G7 which lacks this premium fan technology. Unlike the Seasonic Focus GX-850, it provides better PCIe 5.0 support and a more robust build quality, though it shares similar modular design with the Corsair RM850e.

Thermaltake Toughpower GF3 850W

The Thermaltake Toughpower GF3 850W offers Platinum efficiency and a 10-year warranty, but uses sleeve bearing fan instead of the fluid dynamic bearing found in the Corsair RM850x and EVGA SuperNOVA 850 G7. 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

SpecCorsair RM850xThermaltake Toughpower GF3 850W
Wattage850W850W
Efficiency90% (Cybenetics Gold Certified)Platinum (89-91%)
ModularityFully ModularFully modular
Form FactorATX 3.1ATX 3.1
Fan Type140mm FDB120mm Sleeve Bearing
Warranty10 years10 years
Dimensions150 mm x 85 mm x 160 mm150mm(W) x 86mm(H) x 160mm(D)
Connectors11 modular sockets including 1x 12V-26PCIe 6+2Pin X 4, PCIe 12+4Pin X 1
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