Seasonic X-850 850W Modular Power Supply

850W Seasonic X-Series, Full Modular, 80 PLUS Gold, 1x120mm Fan, ATX, PSU

Scan code: LN36542 Manufacturer code: SS-850KM Request call
In stock
Spend over £225 and Buy Now, Pay Later or spread the cost of your finance over 24-48 months with a 10% deposit.
3xs Approved High End
Delivery options £11.50 By DPD On 28th Mar 2017 DPD Delivered to your specified address. Receive SMS with one-hour delivery window. £4.79 Collect from local shops UPS and DPD Pickup Collect your parcel from your newsagents, petrol stations and convenience stores. Free Collect Instore Q-Collect Place your order online and collect from our Bolton store with Q-Collect. Weekend, timed and European delivery options are available at checkout ScanProtect protection ScanProtect Protect against installation damage for 28 days.More
Product Overview The X Series adopts a clever “Hybrid Silent Fan Control” design, which offers three distinct operation modes, fanless mode, silent mode, and cooling mode. Features • 80PLUS® Gold Certified Super High Efficiency
• Full Modular Cabling Design
• Patented DC Connector Module with Integrated VRM [Voltage Regulator Module]
• DC to DC Converter Design
• Seasonic Hybrid Silent Fan Control
• Sanyo Denki San Ace Silent Fan
• Conductive Polymer Aluminum Solid Capacitors
• Highly Reliable 105? Japanese Brand Capacitors
• Tight Voltage Regulation [±3%]
• Active Power Factor Correction [99% PF Typical]
• High +12V Output
• High Current Gold Plated Terminals
• Dual Sided PCB Layout
• Ultra Ventilation [Honeycomb Structure]
• Multi-GPU Technologies Supported
• All-in-One DC Cabling Design
• Easy Swap Connector
• Universal AC Input [Full Range]
Size ATX
Wattage 850 W
80 PLUS Certification 80 PLUS Gold
Max. Efficiency 87 %
Cooling Fan
Fans 1 x 120mm
Internal +12V Rails Single (1) Rail
Rail 1 +12V 70 A
Rail 2 +12V N/A
Rail 3 +12V N/A
Rail 4 +12V N/A
Rail 5 +12V N/A
Rail 6 +12V N/A
Max. Combined Output +12V 70 A
Modular Yes
Modularity Full Modular
SLI/CrossFire Yes
EPS 12V Yes
Motherboard Connector 20+4-pin
  • 1 x 4+4-pin CPU +12V (EPS)
  • 8 x 4-pin Molex
  • 4 x 6+2-pin PCIe
  • 1 x 8-pin CPU +12V (EPS)
  • 2 x FDD Power
  • 8 x SATA
Package Type  

Please note your statutory rights are not affected.

For further information regarding Scan's warranty procedure please see our terms and conditions

60 months
Return to base
DOA Period:
7 days
RTB Period:
60 months
Manufacturer Contact Details
Seasonic / Scan
0871 472 4747
Customers also bought
850W Seasonic X-Series, Full Modular, 80 PLUS Gold, 1x120mm Fan, ATX, PSU is rated 4.6 out of 5 by 5.
Rated 3 out of 5 by from Really shouldn't make this much noise... At first this PSU seemed much better than my previous, however after loading up any game or using the machine for anything other than idling it starts to make a serious amount of buzzing/whining. There are other options available that can offer the same standard at a lesser cost and don't make this amount of noise.
Date published: 2016-04-13
Rated 5 out of 5 by from Excellent modular PSU Would certainly recommend this to anyone - one of the best PSUs I've had! Top stuff!
Date published: 2016-03-01
Rated 5 out of 5 by from superb compared to other similarly priced PSU's Received the PSU as expected. Following a purchase from amazon of a corsair PSU I had to look for something that would replace a current 850 Watt PSU. The Seasonic was well packaged which a pack of the cables required to plug in to your build with a book odd instructions and a guarantee (unlike the corsair PSU I purchased). As most people that use scan can know what and how to install it will simply say that I installed appropriatly. I plugged in and switched much PC on. It booted up and the PSU worked perfectly. Really applied my overclock it is running as expected. Works well for medium builds and has all the capacity required.
Date published: 2016-02-26
Rated 5 out of 5 by from Excellent build quality. I bought this psu to run my i7/16gb/gxt770 system. It boots out enough power cleanly and quietly, while not being too big to fit in my tower. The modular design and selection of cables was pretty good along with a handy pouch to store the spares in. The box was well padded to protect the psu in transit.
Date published: 2014-06-01
Rated 5 out of 5 by from Worth every penny Not the cheapest PSU, but Gold efficiency, fully modular cables and Seasonic build quality make it a no-brainer. Note for sleevers: the 24pin ATX cable has 4 double wires, making it a little trickier to sleeve using the heatshrinkless paracord method. The EPS12v is 1:1, and it's easy enough to make custom single-plug PCI-E cables (one double wire).
Date published: 2014-03-20
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Questions & Answers

What is the exact model.

hello. I'm wondering if this is the model based on the newest km3 platform from seasonic like the 750W model SS-750KM3 or is this the older model and you don't have on offer 850W newest (km3) power supply from seasonic. Regards
Asked by: Martinez
The one I have is the SS-850KM3
Answered by: dave0ne
Date published: 2016-02-27
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Seasonic X-850 850W Modular Power Supply
Seasonic X-850 850W Modular Power Supply