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Silverstone
Silverstone SST-ST45SF-G 450W SFX power supply
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
- TypeSFX12V
- Maximum Power450 W
- FansSingle 80mm silent fan
- PFCActive PFC (PF>0.90 at full load)
- Main 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.
Highlights
- 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
Specifications
| Brand | SilverStone |
|---|---|
| Series | SFX |
| Model | SST-ST45SF-G |
| Type | SFX12V |
| Maximum Power | 450 W |
| Fans | Single 80mm silent fan |
| PFC | Active PFC (PF>0.90 at full load) |
| Main Connector | 20+4Pin |
| +12V Rails | Single |
| PCI-Express Connector | 1 x 6-Pin, 1 x 6+2-Pin |
| SATA Power Connector | 3 |
| Haswell Support | Yes |
| Efficiency | 87% - 90% (20% to 100% loading) |
| Energy-Efficient | 80 PLUS GOLD Certified |
| Over Voltage Protection | Yes |
| Input Voltage | 90 - 264 V |
| Input Frequency Range | 47 - 63 Hz |
| Output | +3.3V@19A, +5V@14A, +12V@37A, [email protected] , [email protected] |
| MTBF | 100,000 hours at 25°C, full load |
| Connectors | 1 x 24 / 20-Pin motherboard connector (300mm) 1 x 8 / 4-Pin EPS / ATX 12V connector (400mm) 1 x 8/6-Pin PCIE connector (400mm) 1 x 6-Pin PCIE connector (400mm / 150mm) 3 x SATA connector (300mm / 200mm / 100mm) 2 x 4-Pin Peripheral connector (300mm / 200mm) 1 x 4-Pin Floppy connector (300mm / 200mm / 200mm) |
| Features | Support standard SFX form factor and ATX via included bracket 100% modular cables 450W continuous power output at 40? 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 Color: Black (Lead-Free Paint) Protection Over current protection Over power protection Over voltage protection Under voltage protection Short circuit protection No Load Operation |
| Dimensions | 2.50" x 4.92" x 3.94" (H x W x D) |
| Weight | 3.20 lbs. |
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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