Is this PSU 500w or 550w? Label and overview says 550w but title and specs say 500w. I'm confused.

The unit is 550 watts or at least that is what it said on the unit itself.

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SilverStone SFX Series SST-SX550 500 W SFX 80 PLUS GOLD Certified Active PFC Power Supplies

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SFX
80 PLUS GOLD Certified
90 - 264 V 47 - 63 Hz
+3.3V@21A, +5V@22A, +12V@45A, [email protected], [email protected]

🔥Don't forget your OS, we have Windows 11 OEM, Download and USB versions available

Overview

Specs

Reviews (1)

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INTRODUCTION

SFX Series SX550

Supports standard SFX form factor
550W continuous power output at 50? 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

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? 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.

Designed for 80 PLUS Gold level of efficiency to reduce wasted heat and save on electricity.

Built-in 80mm fan has excellent airflow and low noise, perfect for quiet home or office use.

FEATURE PHOTOS

1 x 24 / 20-Pin motherboard connector

1 x 8 / 4-Pin EPS / ATX 12V connector

2 x 8 / 6-Pin PCIE connector

3 x SATA connector

2 x 4-Pin Peripheral connector

1 x 4-Pin Floppy connector

SPECIFICATIONS

Model No.

SST-SX550

Max. DC Output

550W

Power density

693W per liter

Load Range

	+3.3V	+5V	+12V	+5VSB	-12V
Max.(Amps)	21A	22A	45A	2.5A	0.3A
Peak (Amps)	/	/	/	3A	/
Min.(Amps)	0A	0A	0.1A	0A	0A
Range (%)	±3%	±3%	±3%	±5%	±10%
Line Reg.(%)	±1%	±1%	±1%	±1%	±1%
Ripple(mVp-p)	50mV	50mV	120mV	50mV	120mV

Color

Black(Lead-Free Paint)

combined +3.3, +5V

120W

combined +12V

540W

Input Voltage

90V ~ 264V

Input Frequency Range

47Hz ~ 63Hz

PFC

Active PFC(PF>0.9 at Full Load)

Efficiency

87% ~ 90% at 10% ~ 100% loading

MTBF

100,000 hours

Operating temperature

0°C ~ 50°C

Protection

Over Current Protection
Over Power Protection
Over Voltage Protection
Short Circuit Protection
Over Temperature 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" 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

Noise Level

18 dBA minimum

Dimension

125 mm (W) × 63.5 mm (H) × 100 mm (D)

Weight

1.1 kg

Form factor

SFX

Certification

80 PLUS Gold

Other

Compatible with ATX12V v2.4

GALLERY

General
Brand	SilverStone
Series	SFX Series
Model	SST-SX550

Details
Type	SFX
Maximum Power	500 W
Fans	Single 80mm silent fan
PFC	Active
Main Connector	20+4Pin
+12V Rails	Single
PCI-Express Connector	2 x 6+2-Pin
SATA Power Connector	3
Efficiency	87% ~ 90% at 10% ~ 100% loading
Energy-Efficient	80 PLUS GOLD Certified
Input Voltage	90 - 264 V
Input Frequency Range	47 - 63 Hz
Output	+3.3V@21A, +5V@22A, +12V@45A, [email protected], [email protected]
MTBF	>100,000 Hours
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" 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)

Features
Features	Supports standard SFX form factor 550W continuous power output at 50? 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

Dimension & Weight
Dimensions	2.50" x 4.92" x 3.94"
Weight	2.43 lbs.

Protection
Over Voltage Protection	Yes
Short Circuit Protection	Yes
Over Current Protection	Yes
Over Power Protection	Yes
Over Temperature Protection	Yes

Additional Information
First Listed on Newegg	May 13, 2016

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Limited Warranty period (parts): 3 years
Limited Warranty period (labor): 3 years
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Return Policies

Return for refund within: 30 days

Return for replacement within: 30 days

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