Head-to-head · Best 850w Power Supplies

Corsair HX850 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

Corsair HX850 comes out ahead by a narrow margin (4.6 vs 4.3). The gap is mostly about fit for purpose — read the strengths below before deciding.

Higher ratedRanked #1 in Best 850w Power Supplies

Corsair HX850

4.6

The Corsair HX850 is a high-performance power supply that delivers excellent efficiency and silent operation, particularly at low loads thanks to its ZeroRPM mode. Tom's Hardware praised its ability to maintain full power at 46°C and noted its superior noise reduction compared to competitors like the EVGA 850 G3 and Seasonic FOCUS PLUS. KitGuru highlighted its 80 Plus Platinum certification, fully modular design, and robust build quality. However, reviewers noted some drawbacks including OCP issues at 5VSB and bulky cable configurations. This PSU is ideal for enthusiasts seeking reliable, quiet power delivery but may not suit users prioritizing minimal cable clutter.

Strengths

— Full power at 46°C ambient temperature
— 90% efficiency at real-world load conditions
— ZeroRPM mode for fanless operation at low loads

Watch-outs

— OCP at 5VSB
— Bulky ATX, EPS and PCIe cables

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Ranked #4 in Best 850w Power Supplies

Thermaltake Toughpower GF3 850W

4.3

$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 Amazon Full review →

Specs side-by-side

Spec	Corsair HX850	Thermaltake Toughpower GF3 850W
Wattage	850W	850W
Efficiency	80 Plus Platinum	Platinum (89-91%)
Form Factor	ATX	ATX
Modularity	Fully Modular	Fully modular
Fan Size	135mm fluid dynamic bearing	120mm Sleeve Bearing Fan
Warranty	10 years	10 years
Connectors	2x EPS, 6x PCIe 6+2 pin, 16 SATA, 1x FDD, 1x ATX	PCIe 6+2Pin X 4, PCIe 12+4Pin X 1

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