SilverStone SFX Series 450W 80 Plus Bronze SST-ST45SF

SKU: ST45SF Category:

SFX Series

  • Supports standard SFX form factor and ATX via included bracket
  • 450W continuous power output at 50℃ temperature rated for 24/7 operation (V2.0)
  • 450W continuous power output at 40℃ temperature rated for 24/7 operation (V3.0)
  • 80 PLUS Bronze level efficiency (82%~85% efficiency at 20%~100% loading)
  • Class-leading single +12V rail with 36A
  • Silent running 80mm fan (V2.0)
  • Silent running 92mm fan (V3.0)
  • Single PCI-E 8pin and dual PCI-E 6pin connectors support
  • Active PFC

After successfully revolutionizing both HTPC and SFF market segments with innovative chassis designs, SilverStone engineers continue their push for advancement in these categories by releasing a true upgrade-worthy small form factor power supply, the ST45SF. This SFX unit is compatible not only with chassis that use SFX power supplies but also in smaller ATX chassis with the included adapter bracket. Despite its small size, the ST45SF has features that one would expect from an elite ATX power supply such as 80 PLUS Bronze level of efficiency, temperature controlled fan, 50℃ / 40℃ temperature rating, and reliability for 24/7 operation. Enthusiasts oriented features are also present with single +12V rail and 8pin/6pin PCI-E connectors to fully support multi-GPU systems. For SFF users and for SilverStone, the ST45SF is more than just an upgrade, it is an important milestone for the DIY desktop computer.

V2.0 has greater +3.3V and +5V output and higher temperature rating of 10℃ ~ 50℃ for NAS/storage focused systems or industrial PCs (IPC).

V3.0 has greater +12V output and lower noise for home desktops or gaming PCs.


Model No. SST-ST45SF
Max. DC Output 450W
Power density 567W per liter
Load Range (V3.0)
+3.3V +5V +12V +5VSB -12V
Max.(Amps) 20A 20A 37.5A 3A 0.3A
Peak (Amps) / / / / /
Min.(Amps) 0A 0A 0.3A 0A 0A
Range (%) ±5% ±5% ±5% ±5% ±10%
Line Reg.(%) ±1% ±1% ±1% ±1% ±1%
Ripple(mVp-p) 50mA 50mA 120mV 50mV 120mV
Load Range (V2.0)
 +3.3V  +5V  +12V  +5VSB  -12V
Max.(Amps)  21A  22A  36A  2.5A  0.5A
Peak (Amps)  /  /  /  /  /
Min.(Amps)  0.1A  0.2A  0.6A  0A  0A
Range (%)  ±5%  ±5%  ±5%  ±5%  ±10%
Line Reg.(%)  ±1%  ±1%  ±1%  ±1%  ±1%
Ripple(mVp-p)  70mA  70mA  140mV  70mV  140mV
Color Black(Lead-Free Paint)
combined +3.3, +5V 110W (V3.0)
120W (V2.0)
combined +12V 450W / 37.5A (V3.0)
432W / 36A (V2.0)
Input Voltage 90 ~ 264 Vrms
Input Frequency Range 47Hz ~ 63Hz
PFC Active PFC.(PF>0.9 at Full Load)
Efficiency 82%~85%(20% to 100% loading)
MTBF 100,000 hours
Operating temperature 0 ~ 40℃ (V3.0)
10°C ~ 50°C (V2.0)
Protection Over current protection
Over voltage protection
Short circuit protection
Over Power Protection (V3.0 only)
Under Voltage Protection (V3.0 only)
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 / 220mm / 100mm)
2 x 4-Pin Peripheral connector (300mm / 200mm)
1 x 4-Pin Floppy connector(300mm / 200mm / 200mm)
Cooling System Single 92mm silent fan (V3.0)
Single 80mm silent fan (V2.0)
Noise Level 18dBA minimum
Dimension 125 mm (W) x 63.5 mm(H) x 100 mm(D)
4.92″ (W) x 2.5″ (H) x 3.94″ (D)
Weight 1.1 kg (V3.0)
1 kg (V2.0)
Form factor SFX
Other Includes SFX to ATX bracket for use in ATX case
GPU Support list
Compatible with ATX12V v2.4