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.

The short answer

Corsair RM850e comes out ahead by a narrow margin (4.4 vs 4.3). The gap is mostly about fit for purpose — read the strengths below before deciding.

Higher ratedRanked #2 in Best 850w Power Supplies

Corsair RM850e

4.4

$109.99as of Jul 8

The Corsair RM850e delivers solid performance as an affordable ATX 3.0 PSU, earning praise for its efficiency and fully modular design. Tech4Gamers reviewer Sameed Hussain noted it offers 'impressive efficiency and acceptable voltage regulation' despite using non-Japanese capacitors and lacking a native 12VHPWR connector. KitGuru's Allan 'Zardon' Campbell highlighted its 7-year warranty and low-noise operation with a rifle-bearing fan. While it's a budget-friendly option, the lack of a native 12VHPWR connector may disappoint users with high-end graphics cards.

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

$109.99 · Check Price on Amazon Full review →

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 RM850e	Thermaltake Toughpower GF3 850W
Wattage	850W	850W
Efficiency	ATX 3.0	Platinum (89-91%)
Form Factor	ATX Form Factor	ATX
Modularity	Fully	Fully modular
Fan Size	120mm rifle bearing	120mm Sleeve Bearing Fan
Warranty	Seven-year	10 years
Connectors	1x ATX 24-pin, 2x EPS 8-pin, 1x 12V-2x6, 2x PCIe 6+2 pin, 4x SATA, 4x PATA	PCIe 6+2Pin X 4, PCIe 12+4Pin X 1

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