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Cooler Master GX3 850W vs Corsair RM750e: Comparison

Cooler Master GX3 850W and Corsair RM750e separate most on wattage: Cooler Master GX3 850W at 850 W, Corsair RM750e at 750 W, 12% in favour of Cooler Master GX3 850W. They match on 5 other specifications, including 80 plus rating, atx standard and form factor. On price, Corsair RM750e sits at $89.99 against $109.99 for Cooler Master GX3 850W.

Cooler Master GX3 850W (850W/80+ Gold/ATX 3.1/Popular High-End Gaming Tier)
Cooler MasterCooler Master GX3 850W

$109.99

Consumercarts listing

@ Consumercarts listing ›
Corsair RM750e (750W/80+ Gold/Fully Modular/ATX 3.1/Zero RPM/2025 Revision CP-9020295-NA)
CorsairCorsair RM750e

$89.99

Amazon

@ Amazon ›

Specs

Specification
Cooler Master GX3 850W (850W/80+ Gold/ATX 3.1/Popular High-End Gaming Tier)
Cooler Master GX3 850W
Corsair RM750e (750W/80+ Gold/Fully Modular/ATX 3.1/Zero RPM/2025 Revision CP-9020295-NA)
Corsair RM750e
BrandCooler MasterCorsair
Wattage850 W750 W-12%
80 PLUS RatingGoldGold
ATX StandardATX 3.1ATX 3.1
Form FactorATXATX
Single +12V RailYestrue
Cybenetics EfficiencyPlatinumGold
Cybenetics NoiseA-A+
12V-2x6 Connectors11
Sleeved CablesNoNo, flat black ribbon cables
PCIe 8-pin Connectors3Disputed: Corsair lists 1, Corsair's manual shows 2, independent teardown counted 3
Connector Count1x 24-pin ATX, 1x EPS 4+4, 1x EPS 8-pin, 1x 12V-2x6, 3x PCIe 6+2-pin, 8x SATA, 4x Molex1x 24-pin ATX 610mm, 2x EPS 4+4 750-850mm, 1x 12V-2x6 650mm (600W-rated), 1x 12V-2x6-to-dual-8-pin adapter, 6-7x SATA, 2-4x Molex
Fan Size135 mm120
Fan Model / Bearing135mm (Hong Hua HA13525H12F-Z)120mm rifle bearing (Hong Hua HA1225H12SF-Z)
Cable Lengths24-pin 610mm, EPS 600mm, PCIe 550mm, 12V-2x6 650mm, SATA 500+120+120+120mm, Molex 500+120+120+120mm24-pin 610mm, EPS 750-850mm, 12V-2x6 650mm
Length160 mm140
ColourBlackBlack (also sold in White)
MTBF100000 hours100000
ModularityFully ModularFully Modular
ProtectionsOPP, OVP, OTP, OCP, SCP, UVP, Surge & InrushOCP, OVP, OPP, SCP, OTP, UVP
Warranty10 years7-30%
ModelGX III Gold 850RM750e
Typical Price$109.99$89.99

Price comparison

RetailerCooler Master GX3 850WCorsair RM750e
Consumercarts listing

$109.99

View on Consumercarts listing
Amazon

$89.99

View on Amazon
NeweggView on Newegg

Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.

Verdict

Cooler Master GX3 850W

8.3 / 10 Expert Rating

A solid 850W Gold-rated ATX unit for a popular RTX 4070 Ti / RTX 5070-class gaming build, held back only by the usual mid-tier compromises on cabling and OEM sourcing.

Corsair RM750e

8 / 10 Expert Rating

The quietest thing at this money by a real margin, but MSI gives you a better fan, more cables and three more years of warranty for five dollars.

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