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Compact silver SFX power supply with 80mm fan and modular cables visible

Silverstone

Silverstone SST-ST45SF-G 450W SFX power supply

SKU CH-2SGA-57VFE

A 450 W SFX power supply with 80 PLUS Gold efficiency, fully modular cables, a single +12 V rail rated at 37 A, and an 80 mm fan

  • Max wattage450 W
  • Power efficiency87% - 90% (20% to 100% loading)
  • Fan configurationSingle 80 mm silent fan
  • Power factor correctionActive PFC (PF>0.9 at full load)
  • Main power connector20+4Pin
  • 12V railsSingle
  • Gold efficiency cuts power waste with 87% to 90% at typical loads
  • 450 W continuous output handles demanding small-form-factor builds
  • Single +12 V rail delivers 37 A for stable GPU power
  • Fully modular cables simplify routing in tight SFX cases
  • 80 mm fan runs as quiet as 18 dBA for low-noise operation

SFX 450W Gold power supply for compact builds

The Silverstone SST-ST45SF-G delivers 450W continuous output in the SFX12V form factor. It carries 80 PLUS Gold certification with 87 to 90 percent efficiency across 20 to 100 percent load. A single 80mm fan keeps noise down to 18dBA minimum while Active PFC maintains a power factor above 0.90. Fully modular cables simplify routing in small chassis.

Ideal for small-form-factor PCs needing strong 12V

This unit suits builders assembling Mini-ITX or space-constrained systems that demand a single +12V rail rated at 37A. It includes one 6-pin and one 6+2-pin PCIe connector plus three SATA power plugs. Builds requiring more than two PCIe power connections or higher total wattage should look at larger ATX or higher-output SFX models.

Single 37A +12V rail decides GPU headroom

The +12V rail supplies up to 37A, which sets the practical limit for graphics-card power in this chassis class. Combined with 80 PLUS Gold efficiency and 450W total capacity, this figure determines whether a chosen GPU will run stably. Verify your card’s power draw against the 37A rail before purchase.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $219.99
Pricier than about 67% of the 10,869 comparable items (median $142.99).
Max wattage 450 W
Lower than about 86% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameSilverStone
Product lineSFX
Model nameSST-ST45SF-G
Product typeSFX12 V
Ports & slots
PCIe power connectors1 × 6-Pin, 1 × 6+2-Pin
SATA power connectors3
Output type+3.3 V@19A, +5 V@14A, +12 V@37A
Connection types1 × 24 / 20-Pin motherboard connector (300 mm)
1 × 8 / 4-Pin EPS / ATX 12 V connector (400 mm)
1 × 8/6-Pin PCIE connector (400 mm)
1 × 6-Pin PCIE connector (400 mm / 150 mm)
3 x SATA connector (300 mm / 200 mm / 100 mm)
2 × 4-Pin Peripheral connector (300 mm / 200 mm)
1 × 4-Pin Floppy connector (300 mm / 200 mm / 200 mm)
Power
Max wattage450 W
Power efficiency87% - 90% (20% to 100% loading)
Power factor correctionActive PFC (PF>0.9 at full load)
Main power connector20+4Pin
12V railsSingle
Efficiency certification80 PLUS GOLD Certified
Overvoltage protectionYes
Supply voltage90–264 V
AC input frequency47–63 Hz
Size & build
Product dimensions2.5 in × 4.92 in × 3.94 in (H × W × D)
Product weight3.2 lb (1.45 kg)
Compatibility
Haswell compatibilityYes
More details
Fan configurationSingle 80 mm silent fan
Mean time between failures100,000 h at 25 °C, full load

Questions about this item

Will the 450W capacity and single +12V rail at 37A support a modern mid-range graphics card?

The unit delivers 450W total with a single +12V rail rated at 37A, and includes one 6-pin and one 6+2-pin PCIe connector for graphics power.

Does the fully modular cable set include enough SATA connectors for three drives?

Yes, three SATA power connectors are provided on cables with staggered lengths of 300mm, 200mm and 100mm.

Is an ATX mounting bracket included for cases that only accept standard ATX power supplies?

The product supports standard SFX form factor and ATX via an included bracket.

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