Scan code: LN58899 Manufacturer code: CP-9020073-UK

Corsair HX850i 850W Full Modular Power Supply

850W Corsair HX850i, Full Modular, 80PLUS Platinum, SLI/CrossFire, Single/Multi Rail, 70.8A, 140mm Fan, ATX PSU

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Scan code: LN58899 Manufacturer code: CP-9020073-UK
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Order now and get it tomorrow (upgrade to Sunday delivery at checkout)
From £16.16 / month (APR 14.9%)
Monthly Payment: £16.16
Instalment Rate: 14.9% p.a. (fixed)
Cost of purchase: £179.99
Total inc. interest: £193.91
If you are approved for a credit limit with PayPal Credit and use it for future purchases, the APR for those purchases won't be more than 19.9% and may be even lower.

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Purchase Rate: 19.9% p.a. (variable)

Representative: 19.9% APR (variable)

Assumed Credit Limit: £1,200

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Delivery Options
  • By DPD On 2nd Nov To 3rd Nov to your specified address. | £5.48 Receive SMS with one-hour delivery window Weekend, timed and European delivery options are available at checkout

    Have your parcel delivered by DPD to your specified address. Receive SMS with one-hour delivery window

    Weekend, timed and European delivery options are available at checkout
  • Collect instore Collect from our Bolton store, BL6 6PE | Free

    Order online, collect from our Bolton store (25-28 Enterprise Park, Middlebrook, Horwich, Bolton, BL6 6PE)

  • UPS and DPD Pickup Pickup from local convenience store | £4.79

    Collect your parcel from your newsagents, petrol stations and convenience stores

  • SCANPROTECT Protect against installation damage for 28 days. More info

    ScanProtect is an enhanced warranty specifically designed and offered by Scan to reduce the risk of any mishap or damage to components during installation.

    Our aim with ScanProtect is to encourage our customers to upgrade or build their own PC confidently. For a small additional fee our customers are provided with complete peace of mind.

  • 48HR REPLACEMENT If you need to return this item, your replacement will be dispatched within 2 working days of your product arriving back at Scan. More info
Frequently Bought Together

HX850i - Corsair Power Supply - Fully Modular ATX PSU

Corsair HX850i Power Supply 80PLUS - Platinum

Corsair HXi 850W Power Supply

This HXi Series power supply from Corsair has a total power output of 850W, other advantages to the HX850i are that it gives you extremely tight voltage control virtually silent operation, and a fully modular cable set. The 80PLUS Platinum efficiency rating and Zero RPM Fan Mode mean that at low to medium loads, the fan doesn’t spin at all. And when you do push the HXi hard, the thermally controlled fan spins only as fast as it needs to. Even when the fan isn't running the HX850i has specially selected components to reduce electronic noise for a near silent PSU.

View other HXi power outputs:
HX750i - HX1000i - HX1200i

Fully Modular Connectivity


HXi Fully Modular Cable Design

The easy to install, fully modular setup on the Corsair HX850i allows you to combine the low-profile cables provided for a great-looking build. This PSU also comes with Corsair Link Digital for advanced monitoring and control. When connected via the USB to your motherboard, this allows you to monitor the performance and efficiency, toggle the rail modes and control the fan speed directly, this all combined gives you the best power and efficiency in your power supply.

HX850i Efficiency & Noise Graphs


Efficiency Graph


Noise Graph

Corsair HX850i Output Power Chart

DC Output +3.3V +5V +12V -12V +5Vsb
Max Load 25A 25A 70.8A 0.8A 3A
Maximum Combined Wattage 150W 850W 9.6W 15W
Total Power: 850W
DC Output +3.3V +5V +12V1 +12V2 -12V3 +12V4 +12V5 +12V6 +12V7 +12V +5VSB
Max Load 25A 25A 40A 40A 40A 40A 40A 40A 40A 0.8A 3A
Maximum Combined 150W 850W 9.6W 15W
Total Power: 850W

Corsair HX850i Key Features

80PLUS - Platinum

80 PLUS Platinum CertifiedPlatinum certification ensures high efficiency for less excess heat & lower operating costs.

Japanese Capacitors

Japanese 105°C capacitorsPremium internal components ensure solid power delivery and long term reliability.

Zero Fan Mode

Zero RPM Fan ModeFan doesn’t turn on until it’s needed, so you’ll enjoy virtually silent operation at low and medium loads.

10 Year Warranty

Configurable +12V RailIt’s your choice – run it in the default multi-rail +12V mode, or toggle single-rail operation.

Size ATX
Edition HX850i
Wattage 850 W
80 PLUS Certification 80 PLUS Platinum
Max. Efficiency (at 230Vac) 92 %
Cooling Fan
Fans 1 x 140mm
Internal +12V Rails Single/Multi Rail
Rail 1 +12V 70.8 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 70.8 A
Modular Yes
Modularity Full Modular
SLI/CrossFire Yes
EPS 12V Yes
Motherboard Connector 20+4-pin
  • 2 x 4+4-pin CPU +12V (EPS)
  • 2 x 4-pin FDD Power
  • 12 x 4-pin Molex
  • 6 x 6+2-pin PCIe
  • 12 x SATA
Dimensions 150 x 86 x 180 mm (WxHxD)
Package Type Retail
Additional Information
Scan Code LN58899
Model Number CP-9020073-UK
GTIN 843591041232

Please note your statutory rights are not affected.

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

120 months
Return to base
RTB Period:
120 months
Manufacturer Contact Details
0871 472 4747
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Date Issued: 18th Nov 2010

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850W Corsair HX850i, Full Modular, 80PLUS Platinum, SLI/CrossFire, Single/Multi Rail, 70.8A, 140mm Fan, ATX PSU is rated 4.8 out of 5 by 10.
Rated 5 out of 5 by from Excellent PSU, but TYPE 3 Mobo Cable. Excellent PSU. Should you want to fit Coloured Braided Cables, please note the the Motherboard Cable MUST be Type 3, Type 4 fit all PSU sockets EXCEPT the Mobo.
Date published: 2019-05-09
Rated 5 out of 5 by from Great The HX850i is great looking and powerful power supply
Date published: 2019-04-06
Rated 5 out of 5 by from It keeps up no sweat with RX Vega 64 Liquid Cooled The summary says it all. I was a bit worried when AMD came out with the Vega 64 boxes and on them they recommended a minimum 1000W PSU. But this PSU has no trouble running the overclocked GPU even at a 50% power target, a Ryzen 7 overclocked to 3.9GHz and 16GB of DDR4 3200 CL14 ram. No crashes, no hiccups and a very quiet fan. I recommend this PSU.
Date published: 2017-09-04
Rated 5 out of 5 by from Great efficiency, poor cabling. I would recommend this but I thought the plastic cables felt a bit cheap and could have done with being braided or have braided sleeving. Overall I'm happy with it though and the PSU often reaches 92% efficiency under load.
Date published: 2016-10-30
Rated 5 out of 5 by from Solid, quiet power supply This is a sleek, efficient and quiet power supply. There is an abundance of cables for a great deal of flexibility in builds. The cables are also of a good length too, and there was cable length to spare in a mid-tower build. The cables are nicely braided, and reasonably flexible to get through grommets at awkward angles. The connections to the power supply feel solid and are very easy to use. The unit is silent, as far as I am concerned, with the fan spinning only sparingly in normal use. There is no detectable coil whine. The USB link feature is a neat gimmick, and can display power usage and calculated efficiency, which usually shows in excess of 90%. Overall a solid choice for power supply, especially for potential 2-card SLI setups.
Date published: 2016-08-22
Rated 4 out of 5 by from Good quality, fair price - No whine! A PSU that is much cheaper than many others but ultra quiet. This PSU gave me no coil whine. Build quality is excellent, very easy to install and connect.
Date published: 2016-05-19
Rated 5 out of 5 by from Excellent product. Quite and powerful, easy to install Does everything a PSU should do. The modular setup is really good, You only have to use the cables you actually need. The cables are thin and flexible. I would recommend this product
Date published: 2015-05-24
Rated 4 out of 5 by from Pretty Good. Had to get a new power supply as my computer was having some serious problems, so this was first on the list as voltages were all over the place. The unit it self is nice and easy to fit, feels solid and give the impression it is built to last. The leads are easy to fit into the power supply itself, the down side was fitting them to the motherboard, the main power lead is stiff and trying to get it into the position you want a little awkward but not impossible, the other leads are easier, but by the time you have what you need connected you are repositioning them as they want to go back into the shape that they have been sitting in, when they were packaged and that tended to be to close to fan blades. Now I wont lie this has been the first time I have ever had to do this and there are more reviews to come as this was one of many faults that needed sorting, but I would recommend this product as if you get a more up to date case that would help with the positioning of the cables, but the ease of fitting them was a big plus. One thing to take into consideration is the plugs that connect to the motherboard, when connecting them they don't give the feeling that they have 'locked' into place but after checking several times they were all okay and everything powered up on first time of asking.
Date published: 2015-02-26
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Corsair HX850i 850W Full Modular Power Supply
Corsair HX850i 850W Full Modular Power Supply