HX 850W ATX Modular SLI Compliant Power Supply (CMPSU-850HXUK)

  • Corsair Professional Series power supplies set a new standard by which all premium PSUs must be judged.

Stock Code: CA-019-CS

EAN: 0843591004343


Manufacturer: Corsair


Product information: HX 850W ATX Modular SLI Compliant Power Supply (CMPSU-850HXUK)

Corsair Professional Series power supplies set a new standard by which all premium PSUs must be judged. Designed and engineered using cutting-edge technology, each Corsair Professional Series power supply is built to the highest quality standards, and delivers the features and performance that technology enthusiasts demand.

- Enhanced modular flexible cables enable easier cable routing and increased airflow in the system
- Guaranteed to deliver rated specifications at 50ºC.
- Supports the ATX12V v2.3 and EPS12V 2.91 standards and is backwards compatible with ATX12V 2.01 systems
- Double forward switching circuitry design offers high efficiency, up to 90% under typical load range
- Active Power Factor Correction with PF value up to 0.99 provides clean and reliable power to your system
- Ultra quiet 140mm double ball-bearing fan delivers excellent airflow at an exceptionally low noise level by varying the RPM in response to temperature.
- Over Current/Voltage/Power Protection, Under Voltage Protection, and Short Circuit Protection provide maximum safety for your critical system components
- 105ºC rated industrial grade capacitors provide uncompromised performance and reliability, delivering 4 times the lifespan of conventional 85ºC rated capacitors
- Dimension: 150mm(W) x 86mm(H) x 180mm(L)
- MTBF: 100,000 Hours
- 5-Year Warranty

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Customer review "Corsair HX 850W ATX Modular SLI Compliant Power Supply (CMPSU-850HXUK)"

Average customer rating
Star Rating
(from 16 customer reviews)
The box is huge... and when you open it, you see why. Modular cabling is superb, nice...
JG Northampton
Bought this to replace a 700w cheap no name psu. It is very easy to fit and due to...
It's simply a great PSU - quite quiet (I have the fan facing away from the motherboard)...
All Time (16)
88% (14)
12% (2)
0% (0)
0% (0)
0% (0)
Craig 2012-07-14


The box is huge... and when you open it, you see why. Modular cabling is superb, nice little case included by Corsair to keep the unused cables in for later use if needed. Only power supply I've ever had come in its own faux velvet bag, mind...

Quiet, efficient, easy to install and a decent warranty. First time I've used a modular power supply, wouldn't now fit anything else. Recommended.

JG Northampton 2012-02-23


Bought this to replace a 700w cheap no name psu. It is very easy to fit and due to being modular no excessive coils of cables. In use it is very solid and have no issues at all.

As said before 7 year warranty if you keep your receipt.

Jack 2012-01-07

Really nice PSU

It's simply a great PSU - quite quiet (I have the fan facing away from the motherboard) and handles everything I throw at it with gusto.

Carl Ryder 2011-09-01

Slightly louder than expected

Very well packaged and made. only issue i can think of that I'm not happy about is I pretty much expected it to be inaudible when idle but this isn't the case sadly, not that I would call it loud however but I can hear it from my bed 4 meters away.

Jay 2011-06-02

Awsome !

Fantastic PSU ! This PSU just Screams quaity. really is a nice bit of kit. There are a couple of niggles that caused me to give only 4 stars.
1. the main board cables are not the flat and soft type like the modular cables are are very Stiff and hard to move about.
2. the pointless packaging that it comes in.
Appart from that its a Top product and Corsair offer a 7 year warrenty on it so keep your recipt

Duncan 2010-10-08

Very Solid PSU

i have one of these powering:

Rampage 3 Extreme
I7 930 @ 4.2ghz (1.3625v) under a Noctua NH-D14
2 x Zotac GTX 470 in SLI with stock voltage (950mv) @ 705/1410/1710
OCZ Vertex 2E 40GB SSD (Windows 7 64bit)
Westin Digital 320GB HDD
OCZ Platinum DDR3 1600 - 6GB @ 1.6v
Sony Optiarc DVD
Antec 1200 case

I highly recommend it, not one problem... not even when I oc'd the 470's to 800/1600/1710 @ 1050mV

Very quiet and solid PSU!

Swampy 2010-05-13

Top Notch PSU

This PSU, so far appears to be rock solid, it's quiet too!! It comes with more modular connections than you're likely to need, and when not in use Corsair provide a handy little storage bag for the cables, which is a nice touch IMO.

Oh the cables (other than the 24pin atx) are basically flat too t aid in creating a tidy build!

Oli 2010-03-31

Brilliant PSU

I have an i7 overclocked, 2 HDD's, crossfire 5870's and about 9 120mm fans + alot more running of the juice from this beast and it hasnt even felt it!

Absolutly brilliant PSU from corsair 5*

Eoin 2010-02-13

Clean Power

great PSU, modular is handy, nice flat cable desigh makes cable management easy when running cables in narrow spaces. great warrenty. all the power you could need for a crossfire/sli setup. currently running an OC Q9550 quad at 3.4ghz ram at 2.1v 800mhz and 2 HD 4890's plus alot of HDD's, DVD burners, LED fans and 2 UV cold cathodes. plenty of power left over for anything else i can fit in my case.

great quality build for a respectable price. if you need 850w of juice then get this over any other 850w psu, you wont be disapointed.

555BUK 2010-01-29

Buy the best

This PSU may only be rated at 850W, but many online reviews show it can output well in excess of 1000W. It is an extremely solid performer and comes with a manufacturer backed 7-year no-quibble warranty. It powers my 4GHz i7 and crossfired 4970's easily.

Dave 2010-01-26


Just brought this PSU, utterly faultless, it runs like a dream, my old PSU had many problems with too many USB ports filled making it not boot or even when turning off it made a high pitched squeal which grinded on my nerves.

This PSU is really good, plenty of long wires which can reach all the way around my antec 1200 case, should have gotten this a long time ago.

Nige 2010-01-17

Top marks

Its all true, all the praise this PSU gets. I have a moderate system by the this PSUs wattage. q9550 1.3625v 3.825Ghz, radeon 5770, 4 dimms 1081 2.08v, asus p5q deluxe & 4 hard drives. You would need dual 5870 to get into the range this PSU is capable of. It replaced my enermax 500w liberty which was making my pc reboot during overclock tests then at stock.

I knew it was not my ram since I had 2 sets and they both did the same.

I'm not convinced it is as quiet as my enermax 500w liberty with 120mm fan, this has a 140mm fan; however it could be the fact I disturbed a bottom fan in my p180 (yes it fits in there with bottom fan if u remove fan and fit modular cables before replacing fan).

mlb09uk 2009-11-16

quality psu

ordered this friday morning, arrived 24 hours later sat morning, briliant service as always.

as for the pus, not much to say really but its brilliant, does the job its supposed to and the modular cables mean theres less clutter in your case.

Im currently using this with a gtx 275, i7 920 cpu, asus p6t mobo, it handles it brillaintly with loads of room left over.

Robert 2009-10-10

Worth every penny

PSu is heavy (good thing) and dead quiet. It's all due to it's 14cm fan, which makes it also a bit longer then most power suuplies. But never mind that, it fitted into Antec P180 mini no problem. The only thing I'm hearing now is a hard drive, which will tell you how quiet this PSU is. Great buy, not the cheapest 850W you can buy but if you are after extreme quality and even more extreme low noise, it's the one to buy. In few feeks I'll be re-fitting my system with Core i7 and GTX295 and then I'll update how it's doing with extreme performance and overclocked components. Great service form Overclockers, next day delivery, though I ordered after 4pm. Thanks.

chris 2009-09-05

Corsair out do's it self

Well what can one say after having 2 HX620's, but Corsair have done it again Quality, Quality, great PSU. Come's in a black velvet bag nice touch, cable's to many to speak of, nice and quiet, 11 out of 10.

C Kirkpatrick 2009-08-12

Great Item

Great build quality and installed like a dream. Fixed cable lengths are great (PCI-E cables reach from the top of a CM-830 to a second SLI graphics card at a stretch), modular cables are even longer. Great item with a 7 year warranty to boot!

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