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Power Supply: Corsair CMPSU-850HX

Tom's Hardware's 2009 Gift Guide: Part 1, For System Builders
By

www.corsair.com
$179
By: Anthony Celeste

When Tom’s Hardware managing editor Chris Angelini made available the list of this year’s Holiday Buyer’s Guide items, I jumped on the chance to write about the Corsair CMPSU-850HX power supply, since I had already selected it as the power supply for the home build that I’ll be doing next month. 

You probably already know about Corsair’s reputation for building memory and power supplies that run both cool and efficiently. Corsair was voted “Best Power Supply Manufacturer” in 2008 by the readers of Custom PC Magazine, and the Corsair 850HX has a “5 Egg” rating from Newegg.  

The Corsair 850HX's 850 watts of output ensure your components get plenty of power, even in systems running multiple hard drives and multiple graphics cards in CrossFire or SLI mode. An 80 PLUS Silver Certification from the independent 80 PLUS Program assures that the Corsair 850HX runs efficiently at low, medium, and full load, keeping both your case temperature and your power bill under control. 

If you’ve ever built a PC, or for that matter, even opened one up just to swap out a part, you know just how much of a nuisance all those electrical cables can be. The modular design of the Corsair 850HX allows you to use only the cables that you need, so you don’t clutter your case. And you don’t block your system’s airflow with unnecessary electrical wiring. The Corsair 850HX provides six 8-pin graphics card power connectors, powering up to three high-end  ATI CrossFire- or Nvidia SLI-attached graphics cards. The Corsair 850HX also supplies 12 SATA and 12 four-pin Molex connectors for powering your hard drives, optical drives, fans, and other internal peripherals.

The Corsair 850HX provides its power via a single 12 volt rail design. Single-rail setups were criticized somewhat in the past, since it was felt that a single rail wouldn’t distribute power evenly. Two-, three-, four-, and even six-rail power supplies were developed. However, experience has taught that when using multiple rails, it’s very easy for one or more of the rails to not supply sufficient amperage to run all of the rail’s components. In the 850HX, Corsair has avoided the false hype associated with multi-rail implementations. The single-rail design used in the Corsair 850HX ensures that all of your components will receive the amperage they need to run at their potential, stably.  

The Corsair CMPSU-850HX power supply sells online for less than $200. Corsair shows its confidence in this power supply unit with an impressive seven-year warranty.  

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Top Comments
  • 23 Hide
    gtvr , November 25, 2009 9:52 AM
    FoShizzle gets the Freudian slip of the day award
  • 22 Hide
    Bluescreendeath , November 25, 2009 5:40 AM
    She would make a far better Christmas present than hardware components... ;) 
  • 21 Hide
    FoShizzleDizzle , November 25, 2009 8:43 AM
    Bet shes likes a good overcocking.
Other Comments
  • -4 Hide
    the_silent_one , November 25, 2009 5:30 AM
    Anytime you mention eyefinity, be sure to mention that ONE MONITOR MUST EITHER BE ON DISPLAYPORT OR ON AN ACTIVE DISPLAYPORT ADAPTER (not just any displayport adapter, but one that uses supplemental power). If people don't know this. They are in for a rude surprise. Also, if using a displayport to hdmi or dvi active adapter for eyefinity, make it the middle monitor.
  • 22 Hide
    Bluescreendeath , November 25, 2009 5:40 AM
    She would make a far better Christmas present than hardware components... ;) 
  • -2 Hide
    dhowie , November 25, 2009 5:52 AM
    I think she should be on the gift guide, I can certainly bet most of us would rather have her then anything on here :) 
  • 9 Hide
    1898 , November 25, 2009 6:09 AM
    Does she come with the retail version of the i7?
  • -7 Hide
    nanotiberium , November 25, 2009 7:08 AM
    I would like she to bring me the gift! :) 
  • 21 Hide
    FoShizzleDizzle , November 25, 2009 8:43 AM
    Bet shes likes a good overcocking.
  • 11 Hide
    FoShizzleDizzle , November 25, 2009 8:43 AM
    overclocking*
  • 23 Hide
    gtvr , November 25, 2009 9:52 AM
    FoShizzle gets the Freudian slip of the day award
  • 5 Hide
    kencolestud69 , November 25, 2009 10:09 AM
    Sarah, you make christmas better for us(tech geeks) each year.
    :p 
  • 15 Hide
    JeanLuc , November 25, 2009 11:36 AM
    1898Obviously I meant to say i5 but seriously, why isn't there an edit button?


    All your posts you make on the feedback page here can been found in the forum. If you want to edit your post here simply go the review comments (found here) forum, find this article and find you post and click on the quick edit button just and make the changes.

  • 4 Hide
    twanto , November 25, 2009 12:08 PM
    I don't understand why you recommend a 1.65v RAM kit at 1600 when you can have 1600 speeds at 1.5v with other kits, for a lower price. G.skill ripjaws, for example.
  • -7 Hide
    zelannii , November 25, 2009 12:20 PM
    The power supply, really, 850w for $179 and it;s only an 80+, not 85+?

    Sure, it's got 6 8pin connectors... but it onl;y has 850w... an 8pin + 6pig GPU, like the 5890 Toms just recently reviewed, can handle 280w. That means 3 of those alone exceeds this PS performance, not even including any other components...

    1: not modular. 2: too many connectors. 3: not 85% + rated. 4: about $40 too high of a price for what it DOES have.
  • 4 Hide
    blacksins , November 25, 2009 12:22 PM
    well, i saw all the pages only because of her!! i actually use toms hardware from long time ago and never registed, i did now only to comment hehe :p 
  • 4 Hide
    JeanLuc , November 25, 2009 12:26 PM
    Why do I get thumbs down vote when all I do is try and help the guy? Some of you are a bit trigger happy.
  • 11 Hide
    bill gates is your daddy , November 25, 2009 12:31 PM
    Is it wrong for me to want to spank her with my keyboard?
  • 3 Hide
    zak_mckraken , November 25, 2009 12:40 PM
    JeanLucAll your posts you make on the feedback page here can been found in the forum. If you want to edit your post here simply go the review comments (found here) forum, find this article and find you post and click on the quick edit button just and make the changes.

    Wow, thanks! Didn't know we could do that. Finally!
  • -3 Hide
    blacksins , November 25, 2009 1:11 PM
    DigitalkrymeWould of been better without the woman in the pics, cant get a good view of the hardware. Besides that my wife is better looking

    WOW! really?!!
  • -1 Hide
    Anonymous , November 25, 2009 1:51 PM
    JeanLucAll your posts you make on the feedback page here can been found in the forum. If you want to edit your post here simply go the review comments (found here) forum, find this article and find you post and click on the quick edit button just and make the changes.


    Well golly gosh! That's so convenient. In the next iteration, see if you can add more steps.
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