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SilverStone SX550 550W SFX Power Supply, 80 PLUS Gold

Web ID: 26356

550W, SFX, single +12V rails with 45 output, Silent 80mmFan with 18dBA, efficiency 80Plus Gold certification, Fixed cable, 100mm depth, 2xPCIE-8/6pin. ONLY WHILE STOCKS LAST!
Manufacturer Warranty: 1 Year
Manufacturer PN: SST-SX550

silverstone sx550 550w sfx power supply 80 plus gold

? Supports standard SFX form factor

? 550W continuous power output at 50?J operating temperature rated for 24/7 operation

? High efficiency with 80 PLUS Gold certification

? Class-leading single +12V rail with 45A

? Silent running 80mm fan with 18dBA minimum

? Support dual PCI-E 8/6 pin connectors

? Active PFC

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As the standards bearer of SFX PSUs, SilverStone??s continuous breakthrough in power supply miniaturization and power density has resulted in SX550, a standard sized SFX model with high performance but surprisingly affordable price. It has 80 PLUS Gold level of efficiency, 50?J temperature rating, and reliability of a continuous 550W output for 24/7 operation. Furthermore, the SX550 has a flexible single +12V rail with 45A to support dual 8pin/6pin PCI-E connectors for multi-GPU systems. Equipped with automatic temperature control, its 80mm fan can remain silent during idle and provide adequate cooling during high loading conditions. For SFF enthusiasts looking for the best bang for their bucks, the SX550 is an excellent choice.



Model No.
Max. DC Output
Power density
693W per liter
Load Range
+3.3V +5V +12V +5VSB -12V
21A 22A 45A 2.5A 0.3A
Peak (Amps)
/ / / 3A /
0A 0A 0.1A 0A 0A
Range (%)
??3% ??3% ??3% ??5% ??10%
Line Reg.(%)
??1% ??1% ??1% ??1% ??1%
50mA 50mA 120mV 50mV 120mV
Black?]Lead-Free Paint?^
Combined +3.3V & +5V
Combined +12V
Input Voltage
90V ~ 264V
Input Frequency Range
47Hz ~ 63Hz
Active PFC?]PF>0.9 at full load?^
87% ~ 90% at 10% ~ 100% loading
100,000 hours
Operating temperature
0?XC ~ 50?XC
Over Current Protection
Over Power Protection
Over Voltage Protection
Short Circuit Protection
Over Temperature Protection
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" x 2?^
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 80mm silent fan
Form factor
Noise Level
18dBA minimum
125 mm (W) x 63.5 mm (H) x 100 mm (D)
4.92" (W) x 2.5" (H) x 3.94" (D)
1.1 Kg
80 PLUS Gold
GPU Support list?
Compatible with ATX12V v2.4
?? Specifications presented on this page contains most recent revisions and may differ from those printed on retail boxes or manuals.