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Compact silver SFX power supply unit with modular cable sockets and a single cooling fan

Silverstone

Silverstone ST45SF-G 450 W SFX power supply

SKU CH-7670-SEAFX MPN ST45SF-G

A compact 450 W SFX12V unit with full modular cabling, 80 PLUS Gold certification and a single +12 V rail rated at 37 A

  • TypeSFX12V
  • Maximum Power450 W
  • Fans1
  • PFCActive
  • Main Connector20+4Pin
  • +12V RailsSingle
  • 450 W continuous power rated at 50 °C for 24/7 operation
  • Full modular cabling keeps small-form-factor builds tidy
  • 80 PLUS Gold certified efficiency between 87 % and 90 %
  • Single +12 V rail delivers 37 A for multi-GPU support
  • SFX12V design fits SFX cases and ATX with included bracket

450 W SFX Gold power supply

The SilverStone ST45SF-G is a fully modular SFX12V unit that delivers 450 W of continuous power. It carries 80 PLUS Gold certification and operates at 87 to 90 percent efficiency across the 20 to 100 percent load range. A single +12 V rail rated at 37 A supports modern graphics cards. The package includes an ATX mounting bracket for broader case compatibility.

Who this suits

Builders assembling compact systems that require an SFX form factor and Gold-rated efficiency will match the ST45SF-G to their needs. The single 6-pin and single 6+2-pin PCIe connectors limit multi-GPU configurations to two cards at most. Systems demanding higher wattage or additional PCIe cables should look at larger ATX or higher-capacity SFX models.

Single +12 V rail at 37 A

The +12 V rail provides 37 A, which determines whether the unit can sustain your graphics card and CPU combination under full load. Verify the total 12 V current draw of your components against this figure before purchase.

Highlights

  • 450 W continuous power rated at 50 °C for 24/7 operation
  • Full modular cabling keeps small-form-factor builds tidy
  • 80 PLUS Gold certified efficiency between 87 % and 90 %
  • Single +12 V rail delivers 37 A for multi-GPU support
  • SFX12V design fits SFX cases and ATX with included bracket

Specifications

BrandSilverStone
ModelST45SF-G
TypeSFX12V
Maximum Power450 W
Fans1
PFCActive
Main Connector20+4Pin
+12V RailsSingle
PCI-Express Connector1 x 6-Pin, 1 x 6+2-Pin
SATA Power Connector3
SLISLI Ready
Haswell SupportYes
CrossFireCrossFire Ready
ModularFull Modular
Efficiency87%~90%(20% to 100% loading)
Energy-Efficient80 PLUS GOLD Certified
Over Voltage ProtectionYes
Input Voltage90 - 264 V
Input Frequency Range47 - 63 Hz
Output+3.3V@19A, +5V@14A, +12V@37A, [email protected] , [email protected]
MTBF100,000 hours at 25 Degrees C, full load
Connectors1 x 24 / 20-Pin motherboard connector
1 x 8 / 4-Pin EPS / ATX 12V connector
1 x 8/6-Pin PCIE connector
1 x 6-Pin PCIE connector
3 x SATA connector
2 x 4-Pin Peripheral connector
1 x 4-Pin Floppy connector
FeaturesSupport standard SFX form factor and ATX via included bracket
100% modular cables
450W continuous power output at 40 Degrees C operating temperature rated for 24/7 operation
Class-leading single +12V rail with 37A
Strict +/-3% voltage regulation and low ripple & noise
Silent running 80mm fan with 18dBA minimum
Single PCI-E 8pin and dual PCI-E 6pin connectors support
Active PFC
Dimensions4.92" x 2.5" x 3.94"
Weight3.2 lbs.
Shipping weight1.58 kg
Package size231 × 175 × 79 mm

Questions about this item

Does the SFX12V form factor fit in an ATX case using the included adapter bracket?

The SFX12V unit ships with an adapter bracket so it can mount in standard ATX chassis as well as native SFX cases.

Which cables must be attached first when installing this fully modular 450 W supply?

Connect the 20+4Pin main power, the 6-Pin and 6+2-Pin PCI-Express leads, and the three SATA power cables before routing them through the case.

How often should the single 80 mm fan be cleaned to maintain 24/7 operation at 50 °C?

Remove dust from the fan intake every 6 to 12 months to preserve airflow and the 80 PLUS Gold efficiency rating.

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