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SeaSonic USA

SeaSonic S12 Energy Plus SS-550HT 550W ATX12V V2.3 / EPS12V V2.91 SLI Certified CrossFire Ready 80 PLUS Certified Active PFC Power Supply - Retail

5 Year Manufacture direct warranty

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SeaSonic S12 Energy Plus SS-550HT 550W Power Supply - Retail
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SeaSonic S12 Energy Plus SS-550HT 550W Power Supply - Retail SeaSonic S12 Energy Plus SS-550HT 550W Power Supply - Retail SeaSonic S12 Energy Plus SS-550HT 550W Power Supply - Retail SeaSonic S12 Energy Plus SS-550HT 550W Power Supply - Retail SeaSonic S12 Energy Plus SS-550HT 550W Power Supply - Retail SeaSonic S12 Energy Plus SS-550HT 550W Power Supply - Retail SeaSonic S12 Energy Plus SS-550HT 550W Power Supply - Retail SeaSonic S12 Energy Plus SS-550HT 550W Power Supply - Retail
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Manufacturer Warranty

Beyond any applicable Newegg return policy, this item is warranted independently by the product's Manufacturer. Below is a summary provided for convenience only and may not be accurate or current. Use this link for full details.

  • Manufacturer Limited Warranty period (parts): 5 years
  • Manufacturer Limited Warranty period (labor): 5 years

Manufacturer Contact Info

Return Policies

This item is covered by Newegg.com's Standard Return Policy.

  • Return for refund within: 30 days
  • Return for replacement within: 30 days
  • Restocking Fee: Yes
OverviewCustomer ReviewSpecificationsProduct Tour
The SeaSonic S12 Energy Plus power supply is designed for people who need lots of power delivered in a balanced manner for extreme stability. This 550W PSU has four 18A +12Vrails to spread your power needs around. The mobo connectors allow you to use anything from a standard 20P+4P for a standard ATX12V setup to a 24P+8P EPS12V setup for dual CPUs.

Once you’ve got the mobo and CPU powered you need to run power to your peripherals. With nine molex, two FDD and six SATA connectors you don’t have to worry about running out. Dual 6P PCIe connectors support multiple video cards for gamers and graphics professionals.

Keeping everything cool is a 120mm bottom mounted fan. The dual ball bearing fan has and automatic control to balance noise and cooling. Instead of being hard mounted to the PSU housing the fan is insulated by rubber grommets to reduce transmitted vibrations. A honeycomb mesh on the back panel virtually eliminates restrictions to the airflow for maximum cooling efficiency.

Review Summary (read more reviews)

5
newegg
85%
4
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7%
3
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3%
2
newegg
2%
1
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3%
Product Rating:
Total Reviews: 148

Excellent and Quiet

white Reviewed By: Sam on 10/28/2006
Rating + 5
Tech Level Tech Level: high - Ownership: 1 day to 1 week
This user purchased this item from Newegg
Pros: I design power supplies for a living. Getting a 550W off-line supply to run at 88% efficiency takes skill. This seems to be the real deal.
Cons: None
Other Thoughts: 12V and 5V are within 2% on mine. 3.3V is +3.6% This is still excellent regulation.
38 out of 38 people found this review helpful. Did you? Yes No

Get one now

white Reviewed By: Huddy on 1/8/2007
Rating + 5
Tech Level Tech Level: somewhat high - Ownership: less than 1 day
Pros: Top ten reasons this PSU rocks:
10. SeaSonic == Durability & Reliability
9. Sturdy construction
8. It's a snap to install.
7. Black wire sheating keeps case neater.
6. 41A on combined 12V rails.
5. Enough connectors to string up a Christmas tree...
4. High efficiency rating.
3. Handles my fully loaded OC with ease.
2. 120mm fan is ultra quiet.
1. I finally have it.
Cons: They don't grow on trees?
Other Thoughts: It's like a dream come true. Unless you need the ultimate power of PC P&C, SeaSonic is the PSU for YOU!

My specs:
CM Praetorian 730 case
SeaSonic S12 550W PSU
A8R-MVP
AMD X2 4200+
2GB Corsair XMS DDR400
HIS X1900CE
Audigy 2 ZS
300GB Int. HD
DVDROM drive
DVD-R/RW + CD-R/RW drive
3 case fans
16 out of 17 people found this review helpful. Did you? Yes No

Quick Specs (view all30)

ModelSS-550HT
TypeATX12V / EPS12V
Maximum Power501 - 600W
Fans1
PFCActive

Review Summary (read all 148 Reviews)

5
newegg
85%
4
newegg
7%
3
newegg
3%
2
newegg
2%
1
newegg
3%
Product Rating:
Total Reviews: 148

Great Power Supply

white Reviewed By: Jonny5 on 9/4/2009
Rating + 5
Tech Level Tech Level: somewhat high - Ownership: more than 1 year
This user purchased this item from Newegg
Pros: This is a great power supply. I have been running it for more than two years, almost 24/7, in a room with no air conditioning that can get up to 90°F in the summer (albeit in a case with very good airflow.) The power supply is quiet and has survived several power blackouts on an unreliable UPS. Plenty of connectors (I have a lot of devices in my drive bays.)
Cons: When I first got it, every once in a while I would have to push the power button on my case more than once to turn the system on, but that seems to have disappeared, and could just as easily be a problem with the power button on the case.
Other Thoughts: Soundblaster Audigy with bay drive, GeForce 8800 GTS, three 7200rpm hard drives, two optical drives, ASUS A8N32-SLI Deluxe and a socket 939 Athlon X2 4400+ Toledo w/ 1024kb L2 cache per core. Oh, and a good old floppy drive.
1 out of 1 people found this review helpful. Did you? Yes No

Good Quality

white Reviewed By: Raymond on 8/19/2009
Rating + 5
Tech Level Tech Level: high - Ownership: 1 month to 1 year
This user purchased this item from Newegg
Pros: It running quiet, 35C around
88% I cant test it, but it really stable from checking volt
It smaller than other band power supply
I always 24hrs 7days per week
dont shut down computer
and it still no problem
It for replace my old power supply 600W smoked under 24/7
Cons: nothing
Other Thoughts: nothing
0 out of 1 people found this review helpful. Did you? Yes No

Working Well

white Reviewed By: on 8/19/2009
Rating + 5
Tech Level Tech Level: high - Ownership: 1 month to 1 year
This user purchased this item from Newegg
Pros: It running quiet, 35C around
88% I cant test it, but it really stable from checking volt
It smaller than other band power supply
I always 24hrs 7days per week
dont shut down computer
and it still no problem
It for replace my old power supply 600W smoked under 24/7
Cons: nothing
Other Thoughts: AMD X4 810
8GB ram
ATI 4890
4x SATA 1x PATA HD
0 out of 1 people found this review helpful. Did you? Yes No
Model
Brand SeaSonic
Model SS-550HT
Series S12 Energy Plus
Spec
Type ATX12V V2.3 / EPS12V V2.91
Maximum Power 550W
Fans 1 x 12cm Double Ball Bearing Cooling Fan
PFC Active
Main Connector 20+4Pin
+12V Rails 4
PCI-Express Connector 2 x 6-Pin
SATA Power Connector 6
SLI Certified
CrossFire Ready
Modular No
Efficiency up to 88%
Energy-Efficient 80 PLUS Certified
Input Voltage 100 - 240 V
Input Frequency Range 50/60 Hz
Output +3.3V@24A, +5V@30A, +12V1@18A, +12V2@18A, +12V3@18A, +12V4@18A, -12V@0.5A, +5VSB@3.0A
MTBF 100,000 hours at 25°C under full load
Approvals UL, CE, CB, TUV, FCC
Features
Connectors 1 x Main connector (20+4Pin)
1 x 12V(P4)
1 x 12V(8Pin)
9 x peripheral
6 x SATA
2 x Floppy
2 x PCI-E
Features Dual Magnetic Amplifiers [MagAmp]
Double Forward Converter Design
High Reliable Aluminum Electrolytic Capacitors
Smart and Silent Fan Control [S2FC]
Soft-Mounting Rubber Cushions
Ultra Ventilation [Honey Comb Structure]
All in One DC Cabling Design
Patented Easy Swap Connector
Manufacturer Warranty
Parts 5 years limited
Labor 5 years limited

Introduction

The SeaSonic S12 Energy Plus power supply is designed for people who need lots of power delivered in a balanced manner for extreme stability. This 550W PSU has four 18A +12Vrails to spread your power needs around. The mobo connectors allow you to use anything from a standard 20P+4P for a standard ATX12V setup to a 24P+8P EPS12V setup for dual CPUs.

Once you’ve got the mobo and CPU powered you need to run power to your peripherals. With nine molex, two FDD and six SATA connectors you don’t have to worry about running out. Dual 6P PCIe connectors support multiple video cards for gamers and graphics professionals.

Keeping everything cool is a 120mm bottom mounted fan. The dual ball bearing fan has and automatic control to balance noise and cooling. Instead of being hard mounted to the PSU housing the fan is insulated by rubber grommets to reduce transmitted vibrations. A honeycomb mesh on the back panel virtually eliminates restrictions to the airflow for maximum cooling efficiency.

Highlights

newegg ATX12V and EPS12V Compatible
Compatible with the ATX12V and EPS12V standards, the SeaSonic S12 Energy Plus SS-550HT power supply provides maximum stable power to drive the latest Intel and AMD processors as well as other components for desktop and even sever computer systems.
newegg 550W Maximum Power
A maximum power of 550W delivers safe, reliable output for mainstream computer systems.
newegg 80 Plus Certified
The 80 PLUS certified power supply provides high power efficiency of at least 80% at any load between 20% and 100%, saving your money on your electrical bill, reducing heat in your computer's system and prolonging its life.

Photo Gallery

SeaSonic S12 Energy Plus SS-550HT 550W Power Supply - Retail
SeaSonic S12 Energy Plus SS-550HT 550W Power Supply - Retail SeaSonic S12 Energy Plus SS-550HT 550W Power Supply - Retail SeaSonic S12 Energy Plus SS-550HT 550W Power Supply - Retail SeaSonic S12 Energy Plus SS-550HT 550W Power Supply - Retail

Quick Specs

BrandSeaSonic
+12V Rails4
Efficiency> 80%
Energy-Efficient80 PLUS Certified
Input Frequency Range50/60 Hz
Input Voltage100 - 240 V
Main Connector20+4Pin
Maximum Power501 - 600W
MTBF>100,000 Hours
PFCActive
PCI-Express Connector2 x 6-Pin
TypeATX12V / EPS12V
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