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Thermaltake Smart BX3 650W 80+ Bronze power supply
Thermaltake

Thermaltake Smart BX3 650W

Expert rating7.3 / 10

View on AmazonView on thermaltake.com
Wattage:
650 W
80 PLUS Rating:
Bronze
Modularity:
Non-Modular
ATX Standard:
ATX 3.1

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Manufacturer: Thermaltake Last updated: 2026-09-12

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Thermaltake Smart BX3 650W Review

Wanting a budget-friendly PSU that still supports the newer 12V-2x6 GPU connector, the Thermaltake Smart BX3 650W brings ATX 3.0 compliance down into the Bronze-efficiency, sub-$80 price range.

This is a good pick if native 12V-2x6 support matters more to you than efficiency tier: it's one of the few Bronze units in this list with a real ATX 3.0 spike-handling connector instead of a bundled adapter. Just don't expect the acoustic polish of a Gold-tier unit.

ATX 3.0 on a Budget

Thermaltake built the Smart BX3 to be one of the more affordable ways to get a native 12V-2x6 cable, even though the platform underneath is a fairly standard Bronze-tier DC-DC design rather than a premium one.

Comparison to Alternatives

Against the Thermaltake Toughpower GF A3 750W already in the catalog, the Smart BX3 650W drops to Bronze efficiency and semi-modular cables to hit a lower price while keeping the same native 12V-2x6 connector philosophy. Against the Corsair RM750e, the BX3 is cheaper and Bronze-rated rather than Gold, aimed at buyers who want ATX 3.0 compliance without RM-series pricing.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Expert rating7.3 / 10

One of the most affordable routes to a native 12V-2x6 connector, at the cost of Gold-tier efficiency and acoustics.

Best for

  • Budget RTX 4060 Ti/4070 builds wanting native ATX 3.0
  • Mainstream gaming PCs on a tight budget
  • Buyers avoiding PCIe adapter cables

Not for

  • Anyone chasing Gold-or-better efficiency
  • High-wattage or multi-GPU builds
  • Acoustics-focused quiet builds

Specifications

What these specs mean

Identity

BrandThermaltake
Model NumberSmart BX3 650W

Output and rails

Single +12V RailYes

Standards and compliance

Hold-Up Time17 ms

Connector inventory

EPS 8-pin Connectors2
SATA Connectors4
Molex Connectors4

Form factor and fit

Length140 mm
ColourBlack

Cooling

Fan BearingFluid Dynamic

Build quality

TopologyDC-DC with active PFC
MTBF100000 hours

Cables

ModularityNon-Modular

Monitoring, protection and price

ProtectionsOCP, OVP, OPP, OTP, SCP, UVP
Price74.99 USD
Warranty5 years
Wattage650 W
80 PLUS RatingBronze
ATX StandardATX 3.1
Form FactorATX
12V-2x6 Connectors0
Zero-RPM ModeYes
Sleeved CablesNo
PCIe 8-pin Connectors2
Connector Count1x 24-pin ATX, 2x EPS 4+4, 2x PCIe 6+2-pin, 4x SATA, 4x Molex (all fixed)
Fan Size120 mm
Fan Model / Bearing120mm FDB (fluid dynamic bearing) fan with Smart Zero Fan
OEM / PlatformCWT
Cable Lengths24-pin 500mm, EPS 500mm, PCIe 450mm, SATA 500mm

FAQs

What are the key specifications of the Thermaltake Smart BX3 650W (650W/80+ Bronze/Semi-Modular/ATX 3.0/Mainstream Value Pick)?

Key specs for the Thermaltake Smart BX3 650W: Wattage 650 W, Modularity Non-Modular, Fan Size 120 mm, Warranty 5 years, 80 PLUS Rating Bronze, Form Factor ATX.

Will the Thermaltake Smart BX3 650W (650W/80+ Bronze/Semi-Modular/ATX 3.0/Mainstream Value Pick) work with my current setup?

The Thermaltake Smart BX3 650W (650W/80+ Bronze/Semi-Modular/ATX 3.0/Mainstream Value Pick) lists Wattage is 650 W. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.

Who is the Thermaltake Smart BX3 650W (650W/80+ Bronze/Semi-Modular/ATX 3.0/Mainstream Value Pick) best suited to?

Best suited to: Budget RTX 4060 Ti/4070 builds wanting native ATX 3.0; Mainstream gaming PCs on a tight budget; Buyers avoiding PCIe adapter cables.

What are the drawbacks of the Thermaltake Smart BX3 650W (650W/80+ Bronze/Semi-Modular/ATX 3.0/Mainstream Value Pick)?

Not the best fit for: Anyone chasing Gold-or-better efficiency; High-wattage or multi-GPU builds; Acoustics-focused quiet builds.

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