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Seasonic FOCUS Plus 850 Platinum SSR-850PX 850W 80+ Platinum ATX12V & EPS12V Full Modular 120mm FDB Fan Compact 140 mm Size Power Supply

4.7 4.7 out of 5 stars 314 ratings

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About this item

  • COMPACT SIZE - 140 MM DEEP; High power output to size ratio.
  • FULL MODULAR; use only the cables you need to reduce clutter and improve airflow for a better ventilated system.
  • 80 PLUS PLATINUM; 90% efficient at 20% load, 92% efficient at 50% load, and 89% efficient at 100% load.
  • HYBRID SILENT FAN CONTROL; The industry's first, Seasonic patented, advanced three-phased thermal control achieves optimal between silence and cooling. This Hybrid Silent Fan Control functions in three operational stages: Fanless Mode, Silent Mode, and Cooling Mode.
  • 10 YEAR WARRANTY; Our commitment to superior quality.
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Seasonic FOCUS Plus 850 Platinum SSR-850PX 850W 80+ Platinum ATX12V & EPS12V Full Modular 120mm FDB Fan Compact 140 mm Size Power Supply
Seasonic FOCUS Plus 850 Platinum SSR-850PX 850W 80+ Platinum ATX12V & EPS12V Full Modular 120mm FDB Fan Compact 140 mm Size Power Supply
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Price$154.99-10% $134.99
List:$149.99
$159.99$259.99-15% $169.99
List:$199.99
$65.15
Delivery
Get it as soon as Wednesday, Mar 27
Get it as soon as Wednesday, Mar 27
Get it as soon as Wednesday, Mar 27
Get it as soon as Wednesday, Mar 27
Get it Mar 29 - Apr 5
Customer Ratings
Energy efficiency
4.9
4.5
4.9
4.4
4.9
4.2
Easy to install
4.8
4.4
4.7
4.3
4.7
4.4
Noise level
4.7
4.5
4.8
4.4
4.8
4.1
Value for money
4.2
4.8
4.8
3.7
Quality of material
4.6
4.2
4.4
Sold By
Computer Headquarters, Inc
Amazon.com
Amazon.com
Amazon.com
Amazon.com
OneDealOutlet Online
power supply design
Full Modular
Full Modular
Full Modular
Full Modular
Full Modular
connector type
ATX, EPS
ATX
ATX
atx,pcie
ATX
ATX
form factor
ATX12V
ATX
ATX
ATX
ATX
ATX12V
cooling method
Air
Air
Air
Air
Air
Air
fan count
1
1
1
1
1
1
wattage
850 watts
750 watts
1000 watts
1000 watts
500 watts

What's in the box

  • Power Supply
  • Product Description

    Seasonic engineers have created a brand new product line based on advanced technology emanating from many years of intensive active research. The result of this development is the solid FOCUS+ Series, which implements modern design and shows outstanding electrical performance. This power supply is small and entirely modular, which will be hard to resist. It is available in 80 PLUS Platinum efficiency ratings.

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    Additional Information

    Warranty & Support

    Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.
    Product Warranty: For warranty information about this product, please click here

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    Seasonic FOCUS Plus 850 Platinum SSR-850PX 850W 80+ Platinum ATX12V & EPS12V Full Modular 120mm FDB Fan Compact 140 mm Size Power Supply


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    Customer reviews

    4.7 out of 5 stars
    4.7 out of 5
    314 global ratings

    Customers say

    The power supply is a popular choice among customers for its high performance and quiet operation. They appreciate the quality craftsmanship and the fully modular design, which makes installation simple and easy. The power unit is also quiet, with no coil whine. Customers are also satisfied with the cables, saying they are top notch and sleeved. Overall, the power supply has received positive reviews from customers.

    AI-generated from the text of customer reviews

    39 customers mention36 positive3 negative

    Customers are satisfied with the performance of the power supply. They mention that it works well, has no problems, and is quiet. The power supply is fully modular and provides enough power for any mid-high end system. The fan doesn't run much at all, and it is well built.

    "...makes it ideal for the Micro ATX and Mini ITX cases while delivering power enough for even the hogiest of video cards...." Read more

    "...That being said, the product was in excellent condition and works perfectly. The installation was easy and is a perfect fit for my higher end system...." Read more

    "...Pros:Durable.Well packaged.Fully-modular.High Performance.Slick looking design.QUIET!..." Read more

    "...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...." Read more

    34 customers mention34 positive0 negative

    Customers are satisfied with the quality of the power supply. They mention that it is well built, has quality craftsmanship, and is an outstanding product. Customers also say that the included accessories are of great quality. Overall, customers are happy with their purchase and recommend it to others.

    "...Seasonic power supplies are one of the most reliable in the power supply business...." Read more

    "...That being said, the product was in excellent condition and works perfectly. The installation was easy and is a perfect fit for my higher end system...." Read more

    "...I am absolutely blown away by how well built this unit is.Pros:Durable.Well packaged.Fully-modular...." Read more

    "...it out of the included cloth pouch and you really feel the quality craftsmanship on the brushed exterior ...." Read more

    27 customers mention27 positive0 negative

    Customers find the installation of the system power device to be easy. They mention that the fully modular design makes it easier to get a clean installation, and there are no real issues with the install. They also say that the cords are marked and easy to connect to the PSU. Customers also say the installation was simple and easy, and that the cables are easy to manage.

    "...This one is especially easy to configure and install...." Read more

    "...The process for replacing the PSU was very simple and easy...." Read more

    "...The installation was easy and is a perfect fit for my higher end system...." Read more

    "...Seasonic being fully modular made it a lot easier to get a clean installation...." Read more

    20 customers mention18 positive2 negative

    Customers are satisfied with the noise level of the system power device. They mention that it is very quiet and powerful, with no coil whine. The fan stays silent for a long time.

    "...The other great thing about this card is the lack of noise. It is one of the quietest I have used...." Read more

    "...Fully-modular.High Performance.Slick looking design.QUIET!..." Read more

    "...Everything else has been great so far. Silent and does what it needs to do on my high end gaming pc. Looks good and no issues so far." Read more

    "...The new supply solved the problem completely, PC is now almost silent, even under high load. I also think my framerates have improved...." Read more

    15 customers mention15 positive0 negative

    Customers are satisfied with the cables included with the system power device. They mention that the cables are top notch, long enough, and sleeved. The main cables allow you to connect only the cables that you need for your own build. The cables are also long enough to fit in a case, so there's no need to switch cables.

    "...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..." Read more

    "...Other than the PSU the package really does come with a good selection of cables, parts and bonuses...." Read more

    "...QUIET!Nice extras such as the cable storage bag for unused cables and case sticker.10-year WarrantyCons:..." Read more

    "...The modular design is nice and the included cables are top notch...." Read more

    11 customers mention11 positive0 negative

    Customers are satisfied with the appearance of the system power device. They mention that it has a slick looking design, is well designed, and has knick knacks for cable management. They also appreciate the sleeve like covering over the important cables. Customers also mention that the modular design is nice and the included cables are top notch.

    "...exposed is very nicely colored (black with gray highlight) so it looks great to me. Highly recommend, especially for small cases." Read more

    "...Well packaged.Fully-modular.High Performance.Slick looking design.QUIET!..." Read more

    "...The modular design is nice and the included cables are top notch...." Read more

    "...Silent and does what it needs to do on my high end gaming pc. Looks good and no issues so far." Read more

    11 customers mention11 positive0 negative

    Customers like the size of the power supply. They say it's compact, provides plenty of room for the connectors and cables, and is a perfect fit for their higher end system. Customers also mention that it'd be a good choice for those looking for a quiet and efficient power supply for their computer.

    "...12+ rail (makes 840W basically the whole power supply), but its small efficient and reliable!..." Read more

    "...This model is a tiny 150mm x 140mm x 86mm. This small size provided plenty of room for the connectors and cables, behind the supply in my micro ATX..." Read more

    "...The installation was easy and is a perfect fit for my higher end system...." Read more

    "...The box it was packaged in was smaller and perfectly fit the cords and PSU without any additional space like the Corsair box did...." Read more

    10 customers mention10 positive0 negative

    Customers appreciate the modularity of the system power device. They mention that it has a nice sleeve like covering, and is fully modular. They also appreciate the awesome features, such as OPP/OVP/UVP/SCP/OCP/OTP, and high 70A. Overall, customers find the product to be an excellent modular PSU.

    "...Not only does it have awesome features like modularity, OPP/OVP/UVP/SCP/OCP/OTP, high 70A on the 12+ rail..." Read more

    "...Pros:Durable.Well packaged.Fully-modular.High Performance.Slick looking design.QUIET!..." Read more

    "...Ordered Seasonic Focus Platinum 850 as replacement. The unit is fully modular, even the motherboard cable is detachable...." Read more

    "...It has a 10 year warranty and it's fully modular. it's very quiet. I would buy this again for sure. I've used it in 240v mode and 120v mode...." Read more

    Efficiency Savings that Matter
    5 Stars
    Efficiency Savings that Matter
    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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    Top reviews from the United States

    Reviewed in the United States on January 2, 2019
    Reviewed in the United States on April 9, 2019
    Customer image
    5.0 out of 5 stars Efficiency Savings that Matter
    Reviewed in the United States on April 9, 2019
    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!
    Images in this review
    Customer image Customer image Customer image Customer image Customer image Customer image
    Customer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer image
    3 people found this helpful
    Report
    Reviewed in the United States on June 16, 2019
    Customer image
    5.0 out of 5 stars Easy installation, great performance, and excellent service.
    Reviewed in the United States on June 16, 2019
    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
    Images in this review
    Customer image
    Customer image
    Reviewed in the United States on March 3, 2019

    Top reviews from other countries

    Translate all reviews to English
    FERNANDO
    5.0 out of 5 stars Obtienes lo q pagas, algo de excelente nivel!
    Reviewed in Mexico on November 2, 2019
    Arek
    5.0 out of 5 stars La qualité avant tout, je recommande.
    Reviewed in France on May 23, 2019
    Cliente Amazon
    5.0 out of 5 stars Buena fuente.
    Reviewed in Spain on October 3, 2018
    6 people found this helpful
    Report
    Cornelio Z
    5.0 out of 5 stars Muy buena fuente de poder
    Reviewed in Mexico on December 2, 2018
    Migueloncete
    5.0 out of 5 stars Excelente fuente para pc de gama alta
    Reviewed in Spain on September 23, 2019