Head-to-head · Best 850w Power Supplies

Corsair RM850e 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 RM850e comes out ahead by a narrow margin (4.2 vs 4.0). The gap is mostly about fit for purpose — read the strengths below before deciding.

Higher ratedRanked #4 in Best 850w Power Supplies

Corsair RM850e

4.2

3 sources1 derived$119as of Jul 31

The Corsair RM850e is an affordable ATX 3.0 unit that performs solidly, with efficiency and a fully modular layout in its favor. Tech4Gamers reviewer Arsalan Shakil credited it with 'impressive efficiency and acceptable voltage regulation' even with non-Japanese capacitors and no native 12VHPWR connector. KitGuru's Allan 'Zardon' Campbell praised the quiet rifle-bearing fan and the soldering quality, but listed the 7-year warranty among the unit's shortcomings. That missing 12VHPWR connector is the catch for anyone running a high-end graphics card.

Strengths

— High efficiency with 90% efficiency rating
— Fully modular cabling for clean builds
— 7-year warranty for peace of mind

Watch-outs

— No native 12VHPWR connector for latest GPUs
— Uses non-Japanese capacitors

$119 · Check Price on Amazon Full review →

Ranked #6 in Best 850w Power Supplies

Thermaltake Toughpower GF3 850W

4.0

3 sources$109.99as of Jul 31

The Thermaltake Toughpower GF3 850W carries 80 PLUS Gold and Cybenetics ETA Gold certification, ATX v3.0 and PCIe 5.0 compatibility, and a 12VHPWR connector rated at 450W. APH Networks called it a silent-to-very-quiet, fully modular unit built by CWT and cooled by a 135mm fluid dynamic bearing fan, and reported that Thermaltake’s advertised "100% Japanese brand capacitors" claim is false because the polymer capacitors are Chinese-made. Tom's Hardware called it one of the first ATX v3.0 PSUs with decent performance and quiet operation, but measured short peak efficiency and high inrush current at 230V. It fits buyers who want dependable v3.0 compatibility and a 10-year warranty, not those chasing the absolute best in performance or fan quality.

Strengths

— ATX v3.0 and PCIe 5.0 compatible with 12VHPWR connector rated at 450W
— Fully modular design with 135mm fluid dynamic bearing fan for quiet operation
— Semi-passive operation available and selectable

Watch-outs

— Advertised "100% Japanese" capacitors: the polymer capacitors are Chinese-made
— Average transient response at 12V rail
— High inrush current with 230V input

$109.99 · Check Price on Amazon Full 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.

Specs side-by-side

Spec	Corsair RM850e	Thermaltake Toughpower GF3 850W
Wattage	850W	850W
Efficiency	ATX 3.0	80 PLUS Gold, Cybenetics Gold (87-89%)
Modularity	Fully	Fully modular
Fan Size	120mm rifle bearing	135mm Fluid Dynamic Bearing Fan (HA13525H12SF-Z)
Form Factor	ATX Form Factor	ATX
Warranty	Seven-year	10 years
Compliance	80 PLUS Gold	ATX v3.0, EPS 2.92
Connectors	—	PCIe 6+2Pin X 4, PCIe 12+4Pin X 1

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