SeaSonic Electronics FOCUS Plus 850W 80-PLUS Platinum Modular Power Supply

BH #SESSR850PX • MFR #SSR-850PX
SeaSonic Electronics
SeaSonic Electronics FOCUS Plus 850W 80-PLUS Platinum Modular Power Supply
Key Features
  • 850W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX12V Version 2.3
  • 6 x PCI-E Connectors
The FOCUS Plus 80-PLUS Platinum Power Supply efficiently powers up a desktop's internal components by offering up to 850W of energy through fully modular cables. The FOCUS Plus comes armed with six PCIe (8/6-pin) and ten SATA connectors to run graphics cards and storage drives. Other notable connectors include five for older peripherals, utilizing a 4-pin molex design. Aside from the connections, the power supply has a variable-speed fan and a fan-control button, so you can turn the fan off under low loads and on while gaming or editing videos. Additionally, it lets you improve the airflow within a system by removing unused cables.
Temporarily Out of Stock
$169.99

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SeaSonic Electronics 850 Platinum Overview

  • 1Description
  • 280 PLUS Platinum
  • 3Compact Design
  • 4Fluid Dynamic Fan Bearing
  • 5Hybrid Silent Fan Control
  • 6Additional Features

The FOCUS Plus 80-PLUS Platinum Power Supply efficiently powers up a desktop's internal components by offering up to 850W of energy through fully modular cables. The FOCUS Plus comes armed with six PCIe (8/6-pin) and ten SATA connectors to run graphics cards and storage drives. Other notable connectors include five for older peripherals, utilizing a 4-pin molex design. Aside from the connections, the power supply has a variable-speed fan and a fan-control button, so you can turn the fan off under low loads and on while gaming or editing videos. Additionally, it lets you improve the airflow within a system by removing unused cables.

80 PLUS Platinum

The higher the level of efficiency of the power supply, the less power gets wasted in the form of excess heat. The 80 PLUS Platinum certification provides greater than 90, 92, and 89% efficiency at 20, 50, and 100% operating loads, respectively.

Compact Design

This densely packed power supply features a small footprint of 5.5" (140mm), making it suitable for compact ATX cases.

Fluid Dynamic Fan Bearing

Fluid Dynamic Bearing (FDB) fans are designed to take advantage of the impact absorbance effects of oil. They are 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 durable construction, this reliable fan technology also increases the lifespan of the fan.

Hybrid Silent Fan Control

Seasonic's three-phased thermal control provides optimal silence and cooling. This Hybrid Silent Fan Control functions in three operational stages: Fanless Mode, Silent Mode, and Cooling Mode. Benefits of this design include reduced noise, extended fan life, optimized heat dissipation, and silent performance in fanless mode. Additionally, there is a switch at the back of the power supply that allows you to customize cooling by selecting between the Seasonic S2FC (fan control without Fanless Mode) and the S3FC (fan control including Fanless Mode).

Additional Features

The FOCUS Plus power supply is designed with a tight voltage regulation, which reduces voltage variations, to provide smooth and stable operations. Moreover, the back panel and PCB are connected by a copper plate instead of cables to lower the chance of production errors and improve power output quality.

SeaSonic Electronics 850 Platinum Specs

Connectivity
Cable DesignModular
Electrical
Total Wattage850 W
Combined Power for +12 V840 W
Max Load for +12 V70 A
Combined Power for +3.3/+5 V100 W
Max Load for +3.3 V20 A
Max Load for +5 V20 A
Max Power for +5 Vsb15 W
Max Load for +5 Vsb3 A
Max Power for -12 V3.6 W
Max Load for -12 V0.3 A
AC Input Power100 to 240 VAC, 50 / 60 Hz at 6 to 12 A
General
Efficiency Rating80 PLUS Platinum
Active Power Factor CorrectionNone
Cooling
Fan Size120 mm
Bearing TypeFluid Dynamic Bearings (FDB)
Fan Life Expectancy50,000 Hours
Environmental
Operating Temperature32 to 122°F / 0 to 50°C
Physical
ComplianceATX 12 V
ProtectionOver-Current Protection, Over-Power Protection, Over-Temperature Protection, Over-Voltage Protection, Short-Circuit Protection, Under-Voltage Protection
CertificationsENERGY STAR, REACH, RoHS, WEEE, as per Manufacturer
Mean Time Between Failures (MTBF)100,000 Hours
Dimensions5.9 x 5.5 x 3.4" / 150 x 140 x 86 mm
Packaging Info
Package Weight6.9 lb
Box Dimensions (LxWxH)12.441 x 7.559 x 4.488"

SeaSonic Electronics 850 Platinum Reviews

Quiet, efficient, reliable

By James
Rated 5 out of 5
Date: 2022-08-03

So far been very happy with this power supply. I have the computer plugged into a power monitoring outlet and can confirm that it is indeed very good at drawing no more power than it needs to. Supply is also very quiet and runs not too hot.

Good psu

By Sahril
Rated 5 out of 5
Date: 2022-02-13

Very nice..no problem at all..work like a charm..thanks

works

By Peter
Rated 4 out of 5
Date: 2021-09-12

Working as intended

My new go to PS

By Jerome
Rated 5 out of 5
Date: 2021-08-11

After reading many reviews I purchased a SeaSonic, and am very pleased. The build quality is high and it runs cool and silent. I have experience no difficulty with output. I purchased two more for additional systems, with the same good results.

Worth the premium price

By Jonathan
Rated 5 out of 5
Date: 2021-08-06

Definitely one of the most efficient PSU's I've used, great build quality and the Hybrid fan option and the modularity is a great feature. No issues as of yet.

Small form factor, great specs

By Lee
Rated 5 out of 5
Date: 2021-06-24

The small form factor made it possible to run two 140mm fans on the bottom of my bequiet dark base 900 case with room to run cables.

Room to grow

By Scott
Rated 5 out of 5
Date: 2022-06-02

This was my first SeaSonic after years of Corsair power supplies. Price was right, silent and reliable. It's overkill for my current system but as these last up to ten years plenty of growth for future builds.

Dead psu

By Sahril
Rated 1 out of 5
Date: 2022-04-06

Its my another review..too bad after 2 months..the psu is dead

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What are the various voltages and amp of each ...

What are the various voltages and amp of each power supply?
Asked by: jeff
This is a 850W PSU. You can see the various voltage and wattage under "Specs".
Answered by: Nilson D
Date published: 2021-05-27

Is this fully modular???

Is this fully modular???
Asked by: Steven
This is fully modular you should use only the cables you need to reduce clutter and improve airflow for a better ventilated system.
Answered by: Bennie
Date published: 2021-07-14
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