SeaSonic Electronics FOCUS 850W 80 PLUS Gold ATX 12V Power Supply

BH #SESSR850FX • MFR #SSR-850FX
SeaSonic Electronics FOCUS 850W 80 PLUS Gold ATX 12V Power Supply
Key Features
  • 850W Single +12V Rail
  • Intel ATX 12V Form Factor
  • 6 x PCI-E Connectors
  • 10 x SATA Connectors
Designed to deliver up to 850W of total output power to your PC, the FOCUS 850W 80 PLUS Gold ATX 12V Power Supply comes with 6 PCI-E connectors, 10 SATA connectors, 3 four-pin peripheral connectors, and a single floppy connector, in addition to its standard motherboard and CPU connectors.
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SeaSonic Electronics 850 Gold Overview

  • 1Description
  • 280 Plus Gold Certification
  • 3Cable-Free Connection Design
  • 4Hybrid Silent Fan Control
  • 5Fan Control Button
  • 6Fluid Dynamic Fan Bearing

Designed to deliver up to 850W of total output power to your PC, the FOCUS 850W 80 PLUS Gold ATX 12V Power Supply comes with 6 PCI-E connectors, 10 SATA connectors, 3 four-pin peripheral connectors, and a single floppy connector, in addition to its standard motherboard and CPU connectors.

Certified 80 Plus Gold with 90% efficiency at 50% system load, the FOCUS 850W 80 PLUS Gold ATX 12V Power Supply boasts a multi-GPU setup and tight voltage regulation. An embedded 120mm fan with fluid dynamic bearings is designed for quiet operation, optimized heat dissipation, and a longer life span compared to ball bearing fans. The fan's Fanless, Silent, and Cooling modes can be customized with a rear switch that disables the Fanless setting.

The 140mm-deep FOCUS 850W 80 PLUS Gold power supply has a fully modular design, meaning each its cables can be attached or removed depending on your PC's power needs. In addition, a cable-free connection between the PSU's back panel and printed circuit board (PCB) is designed to boost output power quality while also lowering the possibility of production errors.

80 Plus Gold Certification
The Focus Plus Gold Series achieves 80 Plus Gold certification with its 90% efficiency at 50% system load.
Cable-Free Connection Design
Instead of cables, the PSU's back panel and the PCB (Printed Circuit Board) are connected by a copper plate, a design that's intended to lower the chance of production errors during manual insertion as well as help to improve output power quality.
Hybrid Silent Fan Control
This three-phased (Fanless Mode, Silent Mode, and Cooling Mode) thermal control is designed to achieve optimal between silence and cooling. The intended benefits of Hybrid Silent Fan Control include reduced noise without increase in temperature, extended fan life due to the reduced number of fan rotations, optimized heat dissipation, and silent performance in Fanless Mode.
Fan Control Button
A button at the back of the power supply allows users to customize their cooling needs. Selecting the S2FC setting enables fan control without Fanless Mode, meaning the fan spins even during light loads, while the S3FC setting activates fan control including Fanless Mode, during which the fan does not spin during loads under 30%.
Fluid Dynamic Fan Bearing
High performance Fluid Dynamic Bearing (FDB) fans are designed to take advantage of the impact absorbance effects of oil. When the fan shaft rotates, high pressure oil drifts along the grooves of the bearing sleeve to generate a thin layer of lubrication between the bearing faces. As the speed increases, so does dynamic oil pressure and the shaft is lifted from the bearing to create smooth, effortless rotations. The herringbone shape of the groves helps to efficiently channel the lubricant and avert leakage. The lubrication of the bearing surface is intended to reduce friction and vibration, thereby lowering overall power consumption. FDB fans are designed for reliability and longevity, as well as to run cooler and more quietly than ball bearing fans.
UPC: 882016001239

SeaSonic Electronics 850 Gold Specs

Connectivity
Total Connectors
1x 20+4-Pin ATX Motherboard
2x 4+4-Pin EPS CPU
6x 6+2-Pin PCIe
10x 15-Pin SATA
3x 4-Pin Peripheral / Molex
1x 4-Pin Floppy
Cable Design
Flat, Modular
PCIe Connector Distances
29.5" / 750 mm
SATA Connector Distances
31.9" / 810 mm
22.4" / 570 mm
Peripheral Connector Distances
27.2" / 690 mm
Floppy Connector Distances
4.0" / 101 mm
EPS Connector Distances
25.6" / 650 mm
Electrical
Total Wattage
850 W
Number of +12 V Rails
1
Combined Power for +12 V
840 W
Max Load for +12 V
70 A
Combined Power for +3.3/+5 V
100 W
Max Load for +3.3 V
20 A
Max Load for +5 V
20 A
Max Power for +5 Vsb
15 W
Max Load for +5 Vsb
3 A
Max Power for -12 V
3.6 W
Max Load for -12 V
0.3 A
AC Input Power
100 to 240 VAC, 50 / 60 Hz at 6 to 12 A
General
Efficiency Rating
80 PLUS Gold
Efficiency
90% at 50% Load
Cooling
Fan Size
120 mm
Bearing Type
Fluid Dynamic Bearings (FDB)
Fan Life Expectancy
50,000 Hours
Environmental
Operating Temperature
32 to 82°F / 0 to 50°C
Physical
Form Factor
ATX
Compliance
ATX 12 V
Protection
Over-Current Protection, Over-Power Protection, Over-Temperature Protection, Over-Voltage Protection, Short-Circuit Protection, Under-Voltage Protection
Certifications
BSMI, CB, CCC, CE, EAC, ENERGY STAR, ErPLot 6, REACH, RoHS, TUV, WEEE
Mean Time Between Failures (MTBF)
100,000 Hours
Dimensions
5.51 x 5.91 x 3.39" / 140 x 150 x 86 mm
Packaging Info
Package Weight
6.63 lb
Box Dimensions (LxWxH)
12.35 x 7.85 x 4.7"

SeaSonic Electronics 850 Gold Reviews

See any errors on this page? Let us know

To connect to an 8pin graphics card, do you use 2 ...

To connect to an 8pin graphics card, do you use 2 of the 4 pins on a single PCI-e cable or 2 separate PCI-e cables?
Asked by: T
To connect an 8-pin GPU to the SeaSonic Electronics FOCUS 850W 80 PLUS Gold ATX 12V Power Supply, you would use an 8-pin PCIe connector to connect one of the 8-pin PCIe connectors on the PSU. For higher-power graphics cards that require multiple PCIe connectors, the manufacturer recommends using multiple cables.
Answered by: Kennethc
Date published: 2024-01-10

Why so many different models of the 850 W? They ...

Why so many different models of the 850 W? They trying to trick us into buying the wrong one?
Asked by: Bryan
If you have any specific questions about the difference in efficiency ratings for power supplies, please reach out to us at [email protected] with any questions.
Answered by: Miguel
Date published: 2020-09-25

Are the cabling required for AtX motherboards ...

Are the cabling required for AtX motherboards included ?
Asked by: Giacomo
The cables are included.
Answered by: Reuben
Date published: 2019-08-14

Will this fit/work in an alienware aurora R7?

Will this fit/work in an alienware aurora R7?
Asked by: KayyWolf
The Aurora R7 uses a standard size power supply, as such, this product would work.
Answered by: Christopher
Date published: 2020-06-15

How do I connect this to a 8+3 pin graphics card, ...

How do I connect this to a 8+3 pin graphics card, specifically the intel ARC A770?
Asked by: T
The Intel Arc A770 has one 8-pin and one 6-pin PCIe power connector. These can be connected using the PCIe power cables included with the SeaSonic Electronics FOCUS 850W 80 PLUS Gold ATX 12V Power Supply.
Answered by: calvinm
Date published: 2024-01-09
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