Reviews - Corsair HX850 Gold
Sample Provided by: Corsair (By OklahomaWolf on Mon, Jul-30-2012)

Page 1 - First Look

Greetings once again, good peoples of the Interweb. As you can see, today I'm revisiting a Corsair power supply I first saw back in 2009, the HX850. Back then, the HX850 boasted 80 Plus Silver efficiency; being based as it was on the CWT DSG platform.

As always, though, all things must end. That platform is now yesterday's news. That is, if you're a Time Lord and three years ago was yesterday. Having been on the market for quite a while, Corsair has decided that it's time to freshen up this unit with one that can clear 80 Plus Gold. It's that newer version I'm looking at today. I'm looking forward to seeing if it's still the performer we've come to expect from Corsair.

But of course, we have to deal with the box first. There's some marketing on it as usual, and... you know what? I'll just zoom in, rather than do all that extra typing again.

There's that word again: compatibility. Being used in the same paragraph as single rail topology. I've probably said it a thousand times by now, but once more won't hurt. Folks, if your multi-rail unit was designed properly, there will be no compatibility issues. Period. A well designed unit is a well designed unit.

The fact of the matter is this: the bigger you go with these single 12V designs, the more crucial it is for you, the end user, to make sure everything's plugged in properly and securely. If you don't do that, and you end up having something like a partial short that the general overpower protection or short protection in the power supply doesn't catch, suddenly you're letting the magic smoke out of things. And when it comes to single 12V rails, the bigger they are, the higher that protection is set. Multi-rail units will usually have overcurrent protection low enough on each 12V rail to catch the issues missed by general overpower protection and yet not low enough to pose compatibility problems with your hardware.

Ah yes, more marketing. Mr. Fuji, do your thing.

Rock solid stability - we've come to expect that from Corsair, have we not? We'll be the judge of that on the next two pages.

And here we have even more bullet points. Mr. Fuji, how about it? Mr. Fuji's threatening to blind me with his flash. Guess he doesn't want to zoom in again. Fine, I guess I can un-lazy myself for a little bit of typing:


  • Auto-switching circuitry accepts universal AC input from 100V-240V
  • Supports ATX12V 2.31 and EPS12V 2.91 standards and is backward compatible with ATX12V and 2.2/2.01 systems
  • Dimensions: 150mm x 86mm x 180mm

As usual, Corsair's packaging is a box within a box. Unpacking time!

Found inside the inner box was a power supply in a little velvet bag, bag of modular cables, user guide, warranty guide, and a bag of goodies.

Here's the user guide. Above average as these things go, but still not quite as thorough as the novels that come with some Silverstones.

The contents of the goody bag include a case sticker, some zip ties, and some screws. The 8GB flash drive that is shown in the pictures is only included with review samples, and comes with a test report on it for review purposes.

A look at the power supply itself shows us that Corsair isn't quite done with that barbecue grille look just yet. I'm starting to get a little hungry.

Gotta love that matte black finish. Seems very rugged to me.

The exhaust grille. Nice, open design, and yet stylish. I like that.

One thing I like about Corsair is that on the sides of a unit, they usually invert the sticker on one side so that it'll be right side up no matter how you install it in a windowed case. This unit is no exception, as you can see by these pictures.

Here's your George Foreman Fan Grill of the day.

Spec-wise, this unit is identical to the older HX850. It's just gone to the next better 80 Plus certification.

Corsair HX850 Gold

+3.3V +5V +12V -12V +5VSB
25A 25A 70A 0.8A 3A
Max Power @ 50°C

150W 840W 9.6W 15W

The modular connectors are laid out a bit better on this unit than the older version, but there's the same number of them here. Four blue ones for the PCI-E and CPU cables, and six black ones for peripheral cables.

There are four hardwired cables on this unit. I can't say I really object to these - if you need a unit this size, it's not hard to imagine also needing all four of these plugged in.

The modular cables, and good gravy are there a lot of them. We have no less than twelve SATA and twelve Molex connectors in there, in three chains of four connectors each. I have to wonder who these days is going to need that many Molexes anymore. Good thing they're all modular, and you can omit them as needed.

Type of connector: Corsair HX850 Gold
ATX connector (580mm) 20+4 pin
4+4 pin ATX12V/EPS12V connector (650mm) 1
6+2 pin PCI-E connector (650mm) 2
Modular Cables
4+4 pin ATX12V/EPS12V connector (650mm) 1
6+2 pin PCI-E connector (600mm) 4

6+2 pin PCI-E connector (+100mm

5.25" Drive (450mm+100mm+100mm+100mm) 12
5.25" Drive to 3.5" Drive Adapter (100mm) 2

SATA (550mm+100mm+100mm+100mm)

Unit Dimensions (L x W x H)
180mm x 150mm x 81mm


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