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Seasonic

Seasonic FOCUS PX-550, 550W 80+ Platinum Full-Modular, Fan Control in Fanless, Silent, and Cooling Mode, Perfect Power Supply for Gaming and Various Application, SSR-550PX.

    • Based on 3,771 reviews
Condition: New
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Availability: In Stock.
Fulfilled by HappyHomeIT
Arrives Dec 10 – Dec 14
Order within 13 hours and 30 minutes
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Size: 550W


Style: FOCUS PX (new)


Features

  • COMPACT SIZE: 140 MM deep fits ALL ATX systems.
  • FULL MODULAR: Use only the cables you need to reduce clutter to maximize airflow for a better ventilated system.
  • 80 PLUS PLATINUM: Less energy gets wasted during power conversion; Cut down your electricity usage and be Eco-Friendly.
  • PREMIUM HYBRID FAN CONTROL: Unsurpassed silent performance in Fanless Mode. The fan control button at the back of the power supply allows users to customize cooling needs by selecting between Seasonic S2FC (fan control without Fanless Mode) and S3FC (fan control including Fanless Mode).
  • 10 YEAR WORRY-FREE WARRANTY: Our commitment to superior quality.

Description

The newly upgraded FOCUS PX series is the successor to the FOCUS PLUS Series in 80 PLUS Platinum efficiency ratings, which became an instant the top seller in the power supply market after its launch, Seasonic engineers have made improvements on the popular series, removing the inline capacitors on the supplied cables. Besides the small change in the series naming, the PSU housing and its packaging are also updated to be in line with the concept of the OneSeasonic Initiative. Seasonic implements modern design and shows outstanding electrical performance with our new FOCUS PX.


Brand: ‎Seasonic


Series: ‎FOCUS PX-550


Item model number: ‎FOCUS PX-550


Item Weight: ‎3.52 pounds


Product Dimensions: ‎12.2 x 7.09 x 4.53 inches


Item Dimensions LxWxH: ‎12.2 x 7.09 x 4.53 inches


Power Source: ‎AC


Voltage: ‎12 Volts


Manufacturer: ‎Seasonic


Date First Available: ‎August 21, 2019


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Dec 10 – Dec 14

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Awwwwwe, It's cute!
Size: 650W Style: FOCUS SGX (new)
Review Image by Chumly
Reviews are blended here, so this is for the SFX-L 650W version; As stated right above this ^. Probably the best ALL AROUND SFX-L PSU out there. Top performance, average efficiency, then fairly quiet. Even though dimensions are given, it's still pretty cool to see a 650W PSU this small in reality. It has a 120mm Fluid Dynamic Bearing fan which takes up the entire bottom/top, so just look at any 120mm fan and that's pretty much how big it is. If anyone is facing space issues, I'd highly recommend this unit even if your SFF case allows for a full ATX sized one. I end up using only Seasonic PSU's for their exceptional quality and attention to detail and this is no exception. I use to think their included storage bag was overkill but you know what? Now I expect stuff like that just in case I want to take my PSU out on the town. From the Nichicon hold-up cap, through all the Champion controllers, Rubycon, Chemi-Con, and what looks like FPcap filters, and dual 2x Infineon main switches, not one corner was skimped here. Reading reviews prior to purchases, I have heard earlier units only had one EPS connector, but mine positively had a dual-headed EPS connector. With SFX usually being used in iTX builds that don't need it I don't see the concern, but it's there now if you want to use this on something that does need two EPS connectors. I have mine in the pictured Fractal Node 202 and cabling is a cinch. The picture is without the 1050Ti installed for other reviews, but you can see how simple it is by just stuffing it in there. For those that care more, you can separate the ribbon cables, bundle them up into a round bunch and be much more clean...I love ribbon cables for just that ability! Here, I just don't think it matters much with a 65W TDP CPU and separate chambers for the already cool-ish GPU. It's a Blu-Ray player sized case, sorry for no banana for scale. There's a 450W version a little lower priced but I would pick this 650W version and here's my reasoning. This is a reasonably quiet PSU for it's size up to about 300-350W usage which is perfect for mostly everyone. However, after that the fan ramping/profile is very aggressive which I feel is actually loud. I imagine, but can not confirm, that the smaller model would have a profile just as aggressive and would ramp up to "loud" under even lower loads. Take that with a grain of salt because no normal load really gets above 250W in the normal world and this was found only while benchmarking the PSU and the PC itself where these are extreme pulls. The Corsair, which may appear better on paper is just flat out LOUD throughout the entire fan profile and would not recommend for SFF which end up in the entertainment center. It's also just above the 88% needed to gain the ETA-A "Gold" but I really feel most of that is just a sales pitch since Platinum is 90% so does that 2% have an RoE? Wanted to mention it because at times I had anomalies that put it riiiiiight at 88.08% that I can't explain. Others got more solid/repeatable results so I call myself out here as being flawed somewhere. I would buy this again for sure and highly recommend the SFX-L 650W version to anyone looking for a small power supply for a SFF build of any usage. The case had an option for their own PSU which was much lower cost over all, but all problems seem to start at a bad PSU...so piece of mind is worth more to me than dollars. ... show more
Reviewed in the United States 🇺🇸 on June 28, 2019 by Chumly
    • Excellent
Size: 850W Style: FOCUS GX (new)
Works like a charm. First time doing a PSU swap and it was an easy smooth process. Been running it for a couple months now with a 3070 ti. 10 year warranty is huge so not worried about longevity
Reviewed in the United States 🇺🇸 on September 16, 2022 by Trinket Lord
    • Another solid PSU from Seasonic
Size: 650W Style: FOCUS SGX (new)
The SGX-650 is a SFX-L power supply, certified 80Plus Gold and 650W, and fully modular. SFX-L is a PSU form factor just slightly larger than SFX: specifically it has a longer depth at 125mm instead of 100mm. This allows room for an internal 120mm fan for cooling instead of a smaller 92mm fan, which is beneficial for airflow and noise. However, because of this longer physical dimension, you must plan accordingly depending on your PC case. Also noteworthy is that Seasonic uses a fluid dynamic bearing fan, so no cheap sleeve bearings here. Upon first opening the box, you see that the cables and accessories are in their own fabric pouch, and the PSU cube is in another fabric pouch. Everything seems very premium from the get-go. Notably included is a SFX-ATX adapter plate, which allows you to use this PSU in a case that normally only accommodates regular ATX PSUs (more on that later). I am using this PSU with an overclocked Ryzen 2600X with a GTX1060, all in a Fractal Nano S case. The PSU stays absolutely silent under light use (web browsing, watching Netflix, etc). The fan does not spin until I fire up a game, and when it does spin it's pretty quiet. The rest of my review will be notes related to my specific use case. If you are planning on using this with the Fractal Nano S, please read on. One reason I purchased this PSU specifically is because a normal ATX PSU gives the graphics card an uncomfortably small amount of clearance. If you use Seasonic's included adapter, your PSU will not sit exactly all the way to the bottom of the case. Seasonic's adapter plate puts the PSU more toward the middle, which does *not* maximize GPU clearance in the Nano S. Luckily I noticed this in advance and purchased a Silverstone SFX-ATX adapter plate separately. One thing I did not take into account was the length of the included cables. These specs are listed on Seasonic's site, so this was my fault. If you plan on using this PSU in a larger case, measure the length of cable you think you will need. You may need extensions! In the Nano S specifically, the motherboard cable was not quite long enough to route it behind the motherboard tray, so I ended up having to purchase extensions. The included motherboard cable is 350mm long, and the CPU cable is 400mm long. The CPU cable actually *was* long enough, but just barely. I ended up buying an extension for that too even though it wasn't 100% necessary. In conclusion, I have every bit of confidence that this PSU will last a long time. Seasonic's warranty is 10 years, so they must have a lot of confidence in it too. If you follow any reviews on JonnyGuru, you see that Seasonic routinely crushes everyone else in things like voltage ripple and they often go above and beyond the model's 80Plus efficiency rating. I have no problem recommending this PSU to anyone. Just be sure to do some measuring first. ... show more
Reviewed in the United States 🇺🇸 on March 28, 2019 by ChocoT
    • it protected my system!
Size: 1000W Style: PRIME TX (new)
I shocked my pc pretty bad, enough to see a small electric spark traveling off my fingertip onto the case. PC died and screen wouldnt power on anymore. It was completely my fault, i was trying to finish off my build late one night. I was tired and i believe i rubbed against the side of my bed which had a cheapo blanket on. the blanket would easily build up static. Once it was out of order, I took it to my local Micro Center for diagnostics. They concluded that everything was fine but the CPU blew up, luckily i had coverage for replacement. The technician told me if you dont have high quality parts such as your Power Supply or mobo, things could've been much worse. Once I got my replacement CPU, i was back in business. things have been running very well since. I've heard of people have quite a bit of issues with their builds and many PSU related problems but not me! aside from my bonehead cpu damage and some other annoying build issues, it was very easy. I think having a high quality PSU can help eliminate quite a bit of problems from your pc experience. My PSU is set to silent but when i tested it, the fan sounded like a high quality laptop or something ... show more
Reviewed in the United States 🇺🇸 on May 18, 2022 by your customer

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