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Seasonic FOCUS Plus Series SSR-550PX 550W 80+ Platinum ATX12V & EPS12V Full Modular 120mm FDB Fan 10 Years Warranty Compact 140 mm Size Power Supply

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  • ATX12V
  • Full Modular
  • 80 PLUS PLATINUM Certified
  • 100 - 240 V 50/60 Hz
  • +3.3V@20A, +5V@20A, +12V@45A, -12V@0.3A, +5VSB@3.0A

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Seasonic FOCUS Plus Platinum Series Power Supply

With 80 Plus Platinum certification, this power supply delivers stable, high-efficiency output for your powerhouse. Its fully-modular cable design makes for a clean, neat build and better airflow by allowing the use of only the cables needed. A 120 mm cooling fan can operate in Fanless Mode, Silent Mode and Cooling Mode, and a "Hybrid Mode" button allows the inclusion or exclusion of the Fanless mode with a simple press. Plus, its 140 mm depth can fit effortlessly into compact ATX cases, providing ample, reliable power without adding bulkiness.

Seasonic USA

Compact Size
This ultra-high power density, small footprint (140 mm depth) power supply is an ideal choice for all, especially compact ATX cases.

Seasonic USA

Fluid Dynamic Fan Bearing
High performance Fluid Dynamic Bearing (FDB) fans are designed to take advantage of the impact absorbance effects of oil. They are extremely reliable and generate considerably less operating noise and heat than ball bearing fans. The lubrication of the bearing surface reduces friction and vibration and therefore lowers overall power consumption. Due to the effortless, quieter rotations and its robust construction, this reliable fan technology also greatly Increases the lifespan of the fan.

Seasonic USA

Extended Hold-up Time
We extended the PG Hold-up time from the Intel standard In order to allow Seasonic's Focus+ to provide the stable electrical performance even In unstable current Input condition.

Seasonic USA

Cable-free Connection Design
Seasonic's engineers have Implemented a new design feature, where instead of cables; the back panel and the PCB (Printed Circuit Board) are connected by a copper plate. This breakthrough solution not only lowers the chance of production errors during manual insertion but also improves output power quality. Through cable-free design, we commit to provide superior quality up to 10 years.

Seasonic USA

Ultra-High Efficiency, 80 PLUS* Platinum Certified
The Seasonic FOCUS+ 80 PLUS' Platinum certified power supply is rated to achieve 92 % efficiency at 50 % system load.

Seasonic USA

Ultra-High Efficiency, 80 PLUS* GokJ Certified
The Seasonic FOCUS+ and FOCUS 80 PLUS* Gold certified power supply is rated to achieve 90 % efficiency at 50 % system load.

Seasonic USA

DC to DC Converter Design
Provides superior dynamic response, greater system stability and maximizes the 12 V DC rail output.

Seasonic USA

Ample +12 V Output
Enhanced +12 V current capability broadens utilization possibilities.

Seasonic USA

Tight Voltage Regulation [± 3 %]
Improved load regulation reduces voltage variations to providesmooth and stable operations.

Seasonic USA

Active Power Factor Correction [up to 99 %]
Reduces line loss and power distortion.

Seasonic USA

Highly Reliable Aluminum Electrolytic Solid Capacitors
Top-grade, Japan-sourced components extend product life and ensure operation stability under extreme conditions.

Seasonic USA

120 mm Fluid Dynamic Bearing (FDB) Fans
The fluid dynamic bearing (FDB) is a modified standard sleeve beanng which improves the lubrication of the beanng.

Seasonic USA

Compact Size
This ultra-high power density, small footprint (140 mm depth) power supply is an ideal choice for all, especially compact ATX cases.

Seasonic USA

Gold-Plated High Current Terminals
Reduces current transmission resistance for increased efficiency.

Seasonic USA

Multi-GPU Technologies Supported
6-Pin and 8-Pin PCI-E connectors to support all GPU platforms

Seasonic USA

10 Years Warranty
Our commitment to superior quality.
*Except for Focus series with 7 years warranty.

Seasonic USA

Seasonic Hybrid Silent Fan Control *
The industry's first three-phased advanced thermal control achieves optimal balance between silence and cooling through three operational stages: Fanless Mode. Silent Mode, and Cooling Mode. In addition, there is a switch provided to allow for manual selection between the Seasonic S'FC (fan control without Fanless Mode) and the S'TC (fan control including Fanless Mode).

Benefits

  • Reduces noise without increase in temperature
  • Extends fan life by reducing the number of fan rotations
  • Optimizes heat dissipation at all times
  • Fanless Mode provides unsurpassed silent performance

Patent #: TW410250, CN808637, CN1980304. Patent Pending: US. JP
Except for Focus series with Smart & Silent Fan Control.

Seasonic USA Seasonic USA Seasonic USA
Seasonic USA Seasonic USA Seasonic USA
Seasonic USA Seasonic USA Seasonic USA
PX Unboxing

Learn more about the SeaSonic USA SSR-550PX

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Silent

Pros: Swapped a Corsair CX for this unit and am very pleased. The Corsair was fairly quiet under low load but over time became louder and louder, maybe due to the bearings in the fan wearing out.
This Seasonic PSU is silent with hybrid mode on unless you are running a heavy workload. Also, the unit just feels like it's very high quality. Very solid.
It included all the cables I needed to get everything connected out of the box without any issues.

Cons: None so far.

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
Excellent PSU for a medium build

Pros: Low power usage, low profile, can hardly hear the fan even at full power. Hybrid mode is especially useful. Build quality seems good, but I guess if I ever have a problem I can fall back on the 10 year warranty. Now just waiting on that $30 rebate...

Cons: None so far.

Did you find this review helpful?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Good, could have better included cable options

Pros: Build quality seems fantastic, as expected of a seasonic.

Cons: Limited amount of included cables. About half as many included compared to the one I purchased 6 years ago.

Overall Review: Would like more sata cable options. One short cable with two sata power and one extra long with many sata power are not enough. No in-between. Cables are a bit stiff.

1 out of 1 people found this review helpful. Did you?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
10 Year Warranty, Platinum, and fair pricing

Pros: 10 Year Warranty
80+ Platinum rating
Fair pricing
Got it with nice rebate

Cons: None so far
Rebate wasn't for the gold 650 watt which I would have preferred.

Overall Review: Nothing in particular to say. These are some of the nicest PSU's you can find.

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Ownership: 1 week to 1 month
Verified Owner
4/ 5
Happy so far

Pros: Happy with quality and how quiet the power supply is!
Overlooked the including of a floppy cable on purchase, but happy it came with an adapter from molex to floppy!
Can't hear the PSU over the 3x 120mm case fans! quite happy.

Cons: Disappointed how the marketing material claimed 2x PCIe connectors, but in reality this is only a single cable with two PCIe connectors daisy chained... Most high end GPUs explicitly ask for dedicated PCIe cables from PSU and discourage daisy-chained...
Especially disappointed since the PSU itself and has several spare peripheral / pcie modular connectors, but Seasonic cheeped out by only sending a single PCIe cable. These modular cables are not standardized or interchangeable amongst and this makes it very annoying to attempt to acquire another modular after already purchasing and installing PSU. Had I known this, I would have paid $10 more for the 650W version of the PSU...

Overall Review: I recommend carefully checking the cable counts through the manufacturer website as the Newegg description wasn't sufficient. I would also likely suggest to spend a bit more for the 650 or 750 model if you think you'll ever need more than the allotted connectors.

4 out of 6 people found this review helpful. Did you?
Manufacturer Response:
Hello Luke,

Thank you for your comment and glad you appreciate our product. For the PCIe cable, the description on Newegg clearly states that it comes with 2 connectors (not cables). However, we may understand that it can be confusing. Please, kindly contact us at newegg@seasonic.com and we will gladly assist you to get any extra PCIe cable you need.

Once again, thank you very much for your feedback, it's very important for us in order to improve our products and service.
Best Regards,
Ownership: 1 day to 1 week
Verified Owner
5/ 5
Good Stuff.

Pros: Came in quick and works very nice.

Cons: No cons

Overall Review: Would recommend to anyone looking for a new Power Supply.

Did you find this review helpful?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Great Performance and Nice Presentation

Pros: - Fully modular
- Platinum efficiency
- Really nice presentation (nice packaging, little pouch for holding extra cables)
- Feels really well built

Cons: - Ended up not having enough SATA adapters with just the provided cables (needed to buy more from third-party company)
- Seasonic doesn't seem to sell replacement / extra cables (although I may just be looking in the wrong places)

Overall Review: Recently decided to build a whitebox server for Plex, storage, etc. Wanted to get a really nice PSU that would last me a long time; was going to go EVGA as I have had good luck with them in the past, but noticed this Seasonic Full-mod Platinum for a really attractive price ($100 w/ $20 MIR). So far it's been running like a champ - cool and quiet. I will mention that I didn't have enough SATA cables for all of my drives, but since I am running more than the typical number of drives I wouldn't consider that a problem on Seasonic's end (although it would be nice if they had a place to buy extra or replacement cables, couldn't find anything on their website). All in all a very nice PSU, and would definitely recommend to someone looking for a low-cost, high-quality PSU for their next build.

2 out of 2 people found this review helpful. Did you?
Manufacturer Response:
Hello,

Thank you for your comment. We do not sell directly our original cables but we have a partner in the US that is proposing them for us. Please kindly check http://www.btosinte.com to find them. Any question you may have, you can contact us anytime at newegg@seasonic.com

Thank you.
Best Regards
Ownership: 1 week to 1 month
Verified Owner
4/ 5
Great PSU

Pros: -Button to toggle fan off or on in Eco or normal mode
-Inaudible fan when idle and > 2 feet away
-Compact dimensions
-Cool & Efficient
-10 year warranty
-plenty of zip ties and velcro straps

Cons: -Unpleasant ticking noise from fan when it's on at its lowest speeds
-Could use with an extra PCIe cable for GPUs that require more than 8 pins to separately feed power as I was told this is the optimal setup (even though the included cable does have the 8+8 pin works on my 8+6 pin GPU)
-Cable capacitors makes PCIe cable end stick out a bit and cable management slight more challenging
-Manual a bit basic

Overall Review: -Eco button can be confusing: pressed in = normal mode with fan always spinning, not pressed = Eco mode on
-The fan is the only real weakness, but since it's on the bottom of case and it's on my floor and away from me, I can't hear it. I don't know what it's like when my PC is on heavy loads as I still can't hear it.
-Seasonic Support is top-notch; they answered all my emails and each was so quick, regardless of date and time
-This is my second Seasonic PSU and the packaging and accessories are the same quality standard on each with the other one being Gold rating

3 out of 6 people found this review helpful. Did you?
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