Seasonic FOCUS PX-850 | 850W | 80+ Platinum | Full-Modular | ATX Form Factor | Low Noise | Premium Japanese Capacitor | 10 Year Warranty | Nvidia RTX 30/40 Super & AMD GPU Compatible (Ref. SSR-850PX)
Condition: Used - Like New
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This item is eligible for return within 30 days of receipt
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Availability:
Only 1 left in stock, order soon!
Arrives
Jul 29 – Aug 5
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Features
- Voltage: 100 V - 240 V
- Current: 12 - 6 a
- Frequency: 50 Hz - 60 Hz
- Total continuous power: 850W
- 80 plus Platinum
Description
Thanks to its small form factor the focus+ Platinum 850 watt power supply is a Mighty solution for those, who want to implement a smaller HTPC system or living room computer. This High quality unit is built with top-rated highly reliable aluminum electrolytic solid capacitors and it features Seasonic new cable-free connection design where the back panel and the PCB (printed circuit board) are connected by a copper plate. This premium design feature is a breakthrough solution that lowers the chance of production errors and improves output power quality.
Model Name: FOCUS Plus 850 Platinum
Brand: Seasonic
Compatible Devices: Personal Computer
Connector Type: ATX
Output Wattage: 850
Form Factor: ATX12V
Wattage: 850
Cooling Method: Air
Item dimensions L x W x H: 5.51 x 5.91 x 3.4 inches
Item Weight: 6.4 Pounds
Compatible Devices: Personal Computer
Connector Type Used on Cable: ATX
Output Wattage: 850
Form Factor: ATX12V
Wattage: 850
Cooling Method: Air
Power Supply Design: Full Modular
Number of Fans: 1
Fan Size: 120 Millimeters
Maximum Input Voltage: 240 Volts
Minimum Input Voltage: 100 Volts (AC)
Upper Temperature Rating: 40 Degrees Celsius
System Bus Connector Type: 24 Pin
Item Dimensions: 5.51 x 5.91 x 3.4 inches
Item Weight: 6.4 Pounds
Model Name: FOCUS Plus 850 Platinum
Brand: Seasonic
Manufacturer: Seasonic
Global Trade Identification Number: 32
Mfr Part Number: SSR-850PX
Model Number: SSR-850PX
Warranty Description: 10 years
Item Type Name: Power Supply
Unit Count: 1.0 Count
Built-In Media: Power Supply
EU Spare Part Availability Duration: 10 Years
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Jul 29 – Aug 5
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
This is my first experience with a Seasonic branded power supply unit. I am absolutely blown away by how well built this unit is. Pros: Durable. Well packaged. Fully-modular. High Performance. Slick looking design. QUIET! Nice extras such as the cable storage bag for unused cables and case sticker. 10-year Warranty Cons: N/A - This thing is too good to have anything negative to say about it. If you're in the market for a solid PSU that is going to last a long time then I would highly recommend getting a Seasonic. This will be my personal choice for PSUs from here on out! Thank you, Seasonic!
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Reviewed in the United States on March 3, 2019 by Alora Marler
Great power supply! I just received the power supply and it was for the most part easy to install. The only problem I had was the motherboard cable was a little short. I had to run it differently than my Corsair power supply. It is quiet and has many different mode of operation. I like choices and configurability and the 850 PX provides that for me. If my opinion changes I will do a follow up.
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Reviewed in the United States on May 16, 2019 by M. Layne
This is a great power supply. You know when you take it out of the box, the weight feels solid. Then you take it out of the included cloth pouch and you really feel the quality craftsmanship on the brushed exterior . The modular design is nice and the included cables are top notch. A bit stiff at first, but you can make them do what you need for optimal cable management. It pumps out the power i need for my new rig. I bought a Seasonic back in 2011. That rig is still going strong with the same power supply. Its what sold me to stick with them again 8 years later. Love this company.
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Reviewed in the United States on April 8, 2019 by J W
I have a high end, self-built gaming PC, and it's not my first. In previous builds, I didn't use a modular PSU and it was a nightmare. This is actually the second FOCUS Platinum 850 that I've bought. The first, unfortunately, blew a fuse because my new landlord didn't ensure that my apartment had all the proper fuses. However, while the first PSU blew, it saved my entire system from catastrophic failure by doing so. The process for replacing the PSU was very simple and easy. I filled out an RMA and sent back the old PSU and they shipped me a new one (Although I bought a second one anyways because I needed it immediately for work). EASILY the best part about it is that they let me keep the old cables - which was a huge relief because the thought of pulling out all of the old ones and re-doing hours of cable management was a complete nightmare. In the end, it was as simple as unplugging the cables from one unit, dropping the new one in, and plugging all my cables into it. EZ PZ. Pros: -Modular unit saved me a ton of time on replacement -No excess cable ends cluttering up your PC -I can't compare the sound to other PSUs, but in my opinion the noise has never been noticeable. -850w is plenty for a high-end machine, you could even go lower and cheaper. -Customer service saved my butt -I'm a sucker for the black fabric cables -You'll pretty much never think about the thing because it does its job (Unless of course, it blows) Cons: -My first blew but I don't think it was due to malfunction -Paying $140 for a PSU is a little steep, but the customer service made it worth it (Since the replacement was free, I technically got an extra set of cables for free) -Besides that, any cons are probably not noticeable to the average person
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Reviewed in the United States on June 16, 2019 Reviewed in the United States on June 16, 2019 by rose
Typically, people think about almost everything else in a PC first like a graphics card, CPU etc., then the power supply last. Though in fact power supplies are arguably the most important part to any build. Think about it this way, they convert high AC power from your typical home to DC power that every electronic in your systems can use. Essentially it is the heart of your system, but instead it delivers power instead. So, if your heart isn’t running at optimal efficiency then you wont be either. Again, the analogy applies to your PC, though in this case, and analogy, you can buy a better/more efficient heart. That’s where the Seasonic Focus Plus Series comes in! Now I specifically purchased the 850 Platinum (SSR-850PX) and truly love this thing. Not only does it have awesome features like modularity, OPP/OVP/UVP/SCP/OCP/OTP, high 70A on the 12+ rail (makes 840W basically the whole power supply), but its small efficient and reliable! Seasonic power supplies are one of the most reliable in the power supply business. Plus spending a bit up front on a higher efficiency power supply will over time save you money, and the Focus+ line have a 10-year warranty to ensure those savings. Before I get into the math behind power efficiency calculations. All of these calculations were done using the general knowledge from Seasonic’s website and USA kilowatt-hour power averages and a little understating of power calculations that anyone could do on their own. So, let’s get right into it (with the help of spreadsheets)! Using all the standards from 80 Plus (80%) up to Titanium (90%) we can get the cost in electricity over time. So, the more efficient the power supply is running the less power is lost in terms of heat. So, to get relatively linear accurate results for one day we multiply a kilowatt-hour of use ($0.12 is US average) times hours in use per day, then multiply those by the ratio of actual wattage pulled and max wattage of the PSU. So for an efficiency of 89 running at max load for 24 hours it would look like 0.12*24*(901/850)=$3.04 of electricity used for a full day in use. As it can be seen the higher the efficiency the lower the cost per day. Graphing this trend over 10 years shows that buying a more efficient power supply can save money for a small initial investment. Also, that is expecting the power supply will last that long to achieve the savings. Even after 3 years the trend is clear the more efficient power supplies will save money. So, buying a power supply with a longer warranty will ensure those savings. Additionally, buying a cheaper power supply with lower efficient rating will most likely fail sooner and you’ll have to buy another one anyways. Though it’s important to note that initial power supply cost, kilowatt-hour, and specific efficiency tolerances may vary per model, USA location, and wattage. With all that considered the overall electricity calculation methodology can apply for all configurations of PSU’s. The TL;DR version: Invest a bit and buy a higher efficient power supply. It will be a high cost initially, but after about 2-3 years your guaranteed to be saving money overall in electricity. Plus, you’ll have a much more reliably power supply with a longer warranty to power your expensive equipment. Also, you’ll be helping the environment with less electricity used! This review was a non-biased factual review written by an average consumer with access to general product information. All calculations could be redone to verify the results obtained in the associated images. Hope this review helps someone understand power efficiency a little better!
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Reviewed in the United States on April 9, 2019 Reviewed in the United States on April 9, 2019 by Kathy Patterson
Not my first Seasonic. This one is as good or better than any I have used in the past. The fan doesn't run much at all. Included cables were long enough for my case and no installation issues. I would like to see, in all modular power supplies, a single 8 and 6 pin connector for my video card. That would mean I would not have to hide the extra connector on each end of those cables making my build just a bit nicer. Probably just me, but I would pay an extra buck or two for that option. Oh wait, I did that by purchasing the platinum when gold or less would work just as well. Would recommend Seasonic to friends and family.
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Reviewed in the United States on August 2, 2018 by Cranky Customer
I can't begin to count how many PCs I've built, and all of them since [H]OCP was still around, have been from Seasonic. These are the absolute BEST power supplies out there. I have them in every from flight sims to hardcore gaming PCs to servers and not a single failure or hiccup.
Reviewed in the United States on March 10, 2026 by BMW RT Pilot
I had to replace my 5 year old seasonic PSU with another one after upgrading my graphics card. I had no problems with my old one so I wanted to stay with the same brand and this one worked and installed exactly the way you think a PSU would behave. No problems so far and its whisper quiet. Comes with all the cables you would need. Overall a great PSU that will last you a long time!
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Reviewed in the United States on April 9, 2019 by JohnnyJlo128