SilverStone SFX Series 500W SST-SX500-LG

SKU: SX500-LG Category:

SFX Series

  • ■ Silent running 120mm fan with intelligent semi-fanless operation (SX500-LG V1.0)
  • ■ Silent running 120mm fan with 18dBA minimum (SX500-LG V2.0)
  • ■ Support SFX-L form factor and ATX via included bracket
  • ■ High efficiency with 80 PLUS Gold certification
  • ■ 100% modular cables
  • ■ All cables made with flexible flat arrays
  • ■ 500W continuous power output at 40℃ operating temperature rated for 24/7 operation
  • ■ Class-leading single +12V rail with 40A
  • ■ Strict ±3% voltage regulation and low ripple & noise
  • ■ Support dual PCI-E 8/6pin connectors
  • ■ Active PFC
  • ■ All Japanese capacitors

For small form factor enthusiasts, the standard SFX power supply form factor has excellent combination of size, power, and affordability. At 100mm deep, however, the standard SFX PSU is also limited in fan size to 80mm. While advances in engineering and components have made modern high-end SFX PSUs quieter than ever, there is still inherent limitation with 80mm fan’s ability to dissipate heat at maximum loading conditions while maintaining satisfactory noise profile for users sensitive to higher-pitch sounds. With this in mind, SilverStone has released a “lengthened” variation of the SFX form factor called, SFX-L. With 30mm of added depth, a SFX-L power supply has enough room to fit a 120mm fan, thus its maximum load noise can be not only lower in intensity (via slower fan speed), but also lower in pitch (due to larger fan size).

The first model to debut in the SFX-L will be the SX500-LG, a 500W model that includes all features available from top of the line SFX SilverStone PSUs such as 80 PLUS Gold efficiency, modular flexible flat cables, and all Japanese capacitors. An ATX adapter bracket is included as well to enable users to install this PSU into any small or even larger cases that do not have SFX mounting holes.


Model No. SST-SX500-LG
Max. DC Output 500W
Power density 484W per liter
Load Range
+3.3V +5V +12V +5VSB -12V
Max.(Amps) 20A 20A 40A 3.0A 0.3A
Peak (Amps) / / / / /
Min.(Amps) 0A 0A 0A 0A 0A
Range (%) ±3% ±3% ±3% ±5% ±10%
Line Reg.(%) ±1% ±1% ±1% ±1% ±2%
Ripple(mVp-p) 50mA 50mA 120mV 50mV 120mV
Color Black(Lead-Free Paint)
combined +3.3, +5V 105W
combined +12V 480W
Input Voltage 90V ~ 264V
Input Frequency Range 47Hz ~ 63Hz
PFC Active PFC(PF>0.95 at full load)
Efficiency 87%~90%(20% to 100% loading)
MTBF 100,000 hours
Operating temperature 0°C ~ 40°C
Protection Over Power Protection
Over Voltage Protection
Over Temperature Protection
Under voltage protection
Short Circuit Protection
Connectors 1 x 24 / 20-Pin motherboard connector(300mm)
1 x 8 / 4-Pin EPS / ATX 12V connector(400mm)
2 x 8 / 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)
Cooling System Single 120mm silent fan
Noise Level 0 ~ 36 dBA (SX500-LG V1.0)
18 ~ 36 dBA (SX500-LG V2.0)
Dimension 125 mm (W) x 63.5 mm (H) x 130 mm (D)
4.92″ (W) x 2.5″ (H) x 5.12″ (D)
Weight 1.4 Kg
Form factor SFX-L
Certification 80 PLUS Gold
Other Includes SFX to ATX bracket for use in ATX case
GPU Support list
Compatible with ATX12V v2.4