Corsair HX850W (850w) ATX PSU

Cables, Connectors & Internals

Cables, Connectors & Internals
 
The HX850W is fitted with a total of ten modular headers, four of which (the blue ones) are dedicated to PCI-E graphics card power, while the remaining six are for SATA/Molex based devices. Unlike the HX1000W, the HX850W is equipped with a single +12v rail removing the need for any kind of 'layout' sticker next to the modular headers informing users which rail each plug is attached to.
 
Corsair HX850 Modular Connectors Corsair HX850 Modular Connectors
 
In addition to the modular connectors, several cables are hard wired into the unit. These include the ATX, EPS-12v and 2x PCI-E connectors which are pretty much the bare minimum required connectors for powering any PC system. Having these essential cables 'hard-wired' is also a good thing as it not only ensures that critical system components get a good; clean supply of power direct from the PSU, but also avoids potential situations where an ill-fitted modular cable could cause system instability or even kill components.
 
Corsair HX850W Connectors
 ATX Connector Native 1x 20+4 Pin
 EPS-12v / P4-12v Connector(s) Native 1x 4+4 Pin
 Molex Connectors Modular 12x
 Floppy Disk Connectors Modular 2x
 SATA Connectors Modular 12x
 PCI-E Connectors Native / Modular 2x 6+2 Pin / 4x 6+2 Pin
 
 
Corsair HX850w Modular Cables Bag Corsair HX850w Modular Cables
 
Ten modular cables are included inside the canvas pouch which means, yes, you can plug each and every cable provided with the HX850W in at the same time. Not that you'd probably ever need to anyway, unless of course you can find a use for 12x SATA and 12x Molex cables inside your system? No, neither could I - but I'm sure some saddo is going to go out of his way to prove me wrong by sending in pictures of his 24 disk RAID array now.
 
Corsair HX850W ATX Corsair HX850W PCI-E
 
Corsair HX850W PCI-E Corsair HX850W Cables
 
The 24-Pin ATX and 8-Pin EPS-12v connectors both have the ability to be 'broken down' to the older 20-Pin / 4-Pin standards to provide full support for older motherboards. This is also the case for the PCI-E connectors (both hard-wired and modular) which can function in either 8-pin format or 6-Pin format, making the HX850W absolutely perfect for any kind of multi-GPU setup.
 
On thing I almost forgot to mention (which deserves a slap on my wrist because it's so awesome) is the modular cables themselves. As with the rest of the HX line-up Corsair have chosen to construct these cables from an almost 'ribbon cable' style wiring where all of the wires are coloured black and moulded together in a flat ribbon style. This is much better than the traditional sleeving and heatshrink job you see on most modular PSU's and should go a long way to improving the internal appearance of any enthusiasts PC.
 
Corsair HX850W Internals Corsair HX850W Internals
 
And here's the money shots! The internal layout of the HX850W is extremely tidy with a slightly unconventional design PCB in the shape of a reversed 'L'. This appears to have been done so that Corsair could squeeze in an additional primary capacitor at the front of the unit while only having to make a few small adjustments to the modular connector backplane to accommodate it.
 
Corsair HX850W Internals Corsair HX850w Internals
 
Two green transformers sit in the middle of the unit with the larger of the two being responsible for all of the main rails. The smaller one's sole purpose in life is to power the +5VSB rail which is used mainly for USB headers and certain parts of the PC system while in Standby.
 
Either side of the transformers are two thin alumimim blocks used as heatsinks. These differ immensely from the oversized 'finned' heatsinks seen in most other PSU's, which tells me that the HX850W is going to be one extremely cool running unit. Either that or Corsair forgot to install heatsinks and I'm going to get my face burned off!
 
Corsair HX850W Capacitors Corsair HX850W Secondary Caps
 
The primary and secondary capacitors are Japanese manufactured Nippon Chemi-Con KZE's rated at 105°C. The primary caps carry specs of  330uF 420VDC, while the specs of the secondary caps are quite a bit more elusive with the only visible info being 200uF. Regardless, these caps are seriously high quality and should ensure trouble free operation for quite some time in the future.
 
Corsair HX850W DC-DC Conversion Corsair HX850W Model #
 
Nestled in between one of the heatsinks and a bundle of cables are the DC-DC boards. These are responsible for taking the PSU's primary +12v output and stepping it down to +3.3v and +5v rails for the rest of the rails. Several Solid state caps have been used here (in fact the only place in the whole PSU) which is probably more down to space limitations than any kind of quality measures.  Also visible nearby is the PCB model number marked as CMPSU-XXXHX....see I told you this was PSU porn.
 
Corsair HX850W Fan Corsair HX850W Fan
 
Cooling is delivered by a 140mm Yate Loon fan with model number D14BH-12. Specifications taken from Yate Loon's website reveal the fan to be capable of pushing 140CFM at 48.5dBA. Why the HX850W needs a fan with this much grunt is beyond me, but Corsair state that the fan doesn't begin to ramp up until the unit hits 550w. So I'm guessing that at low speeds it may deliver slightly better performance than other models.
 
Now let's move on to the testing and find out if all these fancy components actually result in decent performance.
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Most Recent Comments

25-06-2009, 07:38:09

JN
"Both the Corsair HX620W and HX1000W PSU's were massive hits among enthusiasts, but how does the recently released HX850W perform? Today we find out."

http://www.overclock3d.net/gfx/artic...183437159s.jpg

Corsair HX850W (850w) ATX PSU

25-06-2009, 07:40:46

tinytomlogan
Love the Corsair PSU's, always have and here is another wicked reason too <3

25-06-2009, 08:19:08

uchihas
Oh my god! That's simply amazing! What an amazing efficiency and stability, it seems that Corsair knows how to improve even more the things that are really good.

25-06-2009, 08:38:52

JN
Quote:
Originally Posted by name='uchihas'
Oh my god! That's simply amazing! What an amazing efficiency and stability, it seems that Corsair knows how to improve even more the things that are really good.
Yep. Right at this moment in time I would say that this is the best PSU you can buy. Enermax Revolution85+ comes in a fairly close 2nd, but the HX850W really dominates.

25-06-2009, 08:41:48

monkey7
1kW off a 850W unit without it even blinking O.o That is one rock solid unit right there.

25-06-2009, 08:52:47

JN
Quote:
Originally Posted by name='monkey7'
1kW off a 850W unit without it even blinking O.o That is one rock solid unit right there.
Yeah and 91A off a 12v rail rated at 70A! Anybody still into peltier cooling?

25-06-2009, 08:59:18

Ham
Here's an odd question, does it fit in the PSU bay of the dimas bench tables?

Ask because the kettle plug on my CM unit is situated very close to the edge, meaning it can't be used .

25-06-2009, 09:00:30

tinytomlogan
Quote:
Originally Posted by name='Ham'
Here's an odd question, does it fit in the PSU bay of the dimas bench tables?

Ask because the kettle plug on my CM unit is situated very close to the edge, meaning it can't be used .
feels a fight brewing

25-06-2009, 09:06:58

Rastalovich
Heck of an impressive unit. Price is a little arguable, but tbh it's a quality purchase.

U have to hand it to Corsair when it comes to packaging their psus.

25-06-2009, 09:15:04

cl0ck_ed
why have the cost of psu's gone up so much??. a year ago the hx1000 was 140.

25-06-2009, 09:21:13

JN
Quote:
Originally Posted by name='cl0ck_ed'
why have the cost of psu's gone up so much??. a year ago the hx1000 was 140.
Yeah they have all gone up recently. Not entirely sure why but it started happening abut 3 or so months back.

In the current market tho, 140 is actually very good for a decent 850w. I think the Enermax is closer to 180 which is mighy painful.

25-06-2009, 09:24:06

JN
Quote:
Originally Posted by name='Ham'
Here's an odd question, does it fit in the PSU bay of the dimas bench tables?

Ask because the kettle plug on my CM unit is situated very close to the edge, meaning it can't be used .
Hmm not entirely sure as the kettle plug on the HX is also quite close to the edge. I'll give it a try ad let ya know.

25-06-2009, 09:59:50

Rastalovich
Companies used to have scaled templates on their sites for purposes like this, wonder if Corsair do ??

25-06-2009, 12:39:27

tinytomlogan
Quote:
Originally Posted by name='cl0ck_ed'
why have the cost of psu's gone up so much??. a year ago the hx1000 was 140.
Its because the is still worth lots less than it 'should' be against the $

27-06-2009, 09:48:02

Rastalovich
It's not quite how the UK economy works these days. Ever since the increase in customs control on imported items, especially from outside the EU - but alarmingly (in this "free trade" era) including the EU.

Their pricing considerations start with "what can we get away with charging" b4 they even think of US or EU prices. No thought what-so-ever of costing of production or shipping or anything logical that u might learn in economics.

The previous examples of supply and demand bringing about an equilibrium price are no longer applicable.

27-06-2009, 11:10:51

Wyshniukas
I like Corsair PSUs, have one, but those flat modular cables just doesn't go with me. Round ones would have been brilliant update on this PSU, in my opinion.

12-07-2009, 07:03:17

w3bbo
Sweet PSU...excellent review!

12-07-2009, 19:18:38

mayhem
Quote:
Originally Posted by name='Jim'
Hmm not entirely sure as the kettle plug on the HX is also quite close to the edge. I'll give it a try ad let ya know.
Any info on this. would be interesting to hear as i need to upgrade my screaming PSU.

13-07-2009, 03:46:31

JN
Quote:
Originally Posted by name='mayhem'
Any info on this. would be interesting to hear as i need to upgrade my screaming PSU.
To be honest I'd totally forgot. I'll try and remember to dig the case out of the garage tonight and give it a whirl.

17-10-2009, 15:37:03

gorilazm
Quote:
Originally Posted by name='Jim'
"Both the Corsair HX620W and HX1000W PSU's were massive hits among enthusiasts, but how does the recently released HX850W perform? Today we find out."
Few days ago purchase coolmaster 850 modular. i thought it will be quiet and many online test reviews say that, but the actual PSU make annoying noise like small transformer what make him louder then own cooler. can you,please, tell me is Corsair hx850w have any annoying cracking/bugnoise accept cooler. will you say it is really quite PSU.

25-10-2009, 15:10:58

e07
Quote:
Originally Posted by name='gorilazm'
Few days ago purchase coolmaster 850 modular. i thought it will be quiet and many online test reviews say that, but the actual PSU make annoying noise like small transformer what make him louder then own cooler. can you,please, tell me is Corsair hx850w have any annoying cracking/bugnoise accept cooler. will you say it is really quite PSU.
Have to say that I have being using the HX850w for nearly two months now and I am kinda sorry that I bought it. It is much louder that my last psu ( tagen turbojet 900 ).Then all I could hear were the hard drives. Can get on your nerves after a while but I am stuck with it as I sold my tagen.

25-10-2009, 16:21:46

JN
Quote:
Originally Posted by name='e07'
Have to say that I have being using the HX850w for nearly two months now and I am kinda sorry that I bought it. It is much louder that my last psu ( tagen turbojet 900 ).Then all I could hear were the hard drives. Can get on your nerves after a while but I am stuck with it as I sold my tagen.
I find that really surprising. Are you sure your HX850w doesnt have a faulty fan? The Tagan Turbojets are named that way for a reason...they sound like an airplane taking off.

26-10-2009, 05:10:24

e07
The tagen for me was very quite.You could just about hear it when it was working hard but it had no anoying 'whine'. My HX850 on the other hand has an soft but noticable 'whine' that gets on my nerves. It just has a different sound that I dont like. But thats me and others may have no problem with it.

26-10-2009, 18:32:59

Stefan Payne
Quote:
Originally Posted by name='Jim'
I find that really surprising. Are you sure your HX850w doesnt have a faulty fan? The Tagan Turbojets are named that way for a reason...they sound like an airplane taking off.
No, not neccissarily.

I've heard some complaints about the noise of the two new HX-Series Units.

Maybe you had the version with a Yate Loon fan and he had one with Ong Hua fan.

26-10-2009, 18:34:34

Bungral
My HX750 is lovely and quiet.. Only thing I can hear is my pump vibrating against the foam I have it on. Hmmm have to sort that out.

27-10-2009, 08:02:55

Nelly
Quote:
Originally Posted by name='Bungral'
My HX750 is lovely and quiet.. Only thing I can hear is my pump vibrating against the foam I have it on. Hmmm have to sort that out.
I bought the HX750 just over a week ago, have to agree very quiet, I much prefer the cable connectors on these PSU's too - 7 year warranty which Scan will cover for you which is excellent.

28-10-2009, 22:22:07

bapetpe
That's great! That's quite a very informative post. Thanks for your share.

12-05-2010, 14:21:07

fredeb
I myself own a HX850W , runs cool and quiet - amazing PSU .

21-06-2010, 15:48:15

Kartoff
The best PSU ever made i think !!! If u have noises seems u can stop the fan and PSU dont overheat And also seems it can handle even more than 1084W if u do something with protections ;-) Really verry nice PSU !!! I have it a couple of monts and will buy it again
Reply
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