Corsair HX850 Gold 850W Power Supply

Three years ago, give or take a month, Corsair came in here with a new power supply based on a new platform, called it the HX850, and walked away with their first ever perfect score for performance. Today, they’ve come to me with the replacement for that unit in the newly redesigned HX850. This time, bearing 80 Plus Gold certification. Let’s see if they’ve been able to keep that stellar performance the HX850 was known for.

REVIEW INFORMATION
SUPPLIED BY: Corsair
MANUFACTURER: Corsair
PRODUCT: HX850 Gold 850W
PROD LINK: HX850 Gold Product Page
PRICE: $199.99 MSRP
Price is at the time of testing!

Corsair HX850 Gold 850W

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.

Corsair HX850 Gold 850W

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.

Corsair HX850 Gold 850W

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.

Corsair HX850 Gold 850W

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

Corsair HX850 Gold 850W

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.

Corsair HX850 Gold 850W

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:

COMPATIBILITY

  • 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

Corsair HX850 Gold 850W

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

Corsair HX850 Gold 850W

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.

Corsair HX850 Gold 850W

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.

Corsair HX850 Gold 850W

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.