Premium power, excellent performance: Corsair AX850 PSU review

Bennett Ring
16 December 2010, 11:45 AM


If you need mission-critical stability, this is the power supply you want. Oh, and there's a seven-year warranty... just in case you didn't believe us.


At the heart of any performance PC is a critical component, without which the rest of the machine can't function. Can you guess what it is? Those who said motherboard... got it entirely wrong. Without a decent PSU, it doesn't matter how stable or overclockable your motherboard is. The Corsair AX850 targets the premium end of the PSU market - users with the most demanding power needs; but is the far higher price warranted?

Like most upper-end PSUs, the AX850 uses a modular cable design. Helping to remove the spaghettified mess found in most cases, you can plug in as many or as few cables as you need. With eleven different cables, each having multiple plugs, it'll deliver juice to a massive range of goodies. These cables come in a tidy cloth bag, so you don't lose them over time.



Using "Hybrid Silent Fan Control", we couldn't hear the PSU at all during our testing. Over-Current Protection is included on all rails, as well as Over-Temperature Protection and Short-Circuit Protection. With a seven-year warranty, Corsair's claims of mission-critical stability seem easy to believe. Using an active load tester, our tests showed that voltage regulation was above average - it delivers as promised.

The modular design and excellent performance is overkill for normal PC users, but if you demand a rock-solid power supply that delivers clean, pure energy, look no further than this specialised power plant.

Available from Corsair, retailing for $259.
APC rating: 9/10

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Zoidbergmerc (New user):

You call that a review? cmon where are all the specs and the results from these "Tests" you did.

But yes, it is an amazing power supply.

16 December 2010, 12:50 PM (2 years ago)report abuse Send to a friend reply

Linoob (New user):

After having nothing but trouble with a 500w Antec power supply that could not handle my basic desktop ( unable to run 2 sticks of Corsair 1066 memory at full speed without freezing, finally hopeless on 5v rail on 2 identical systems) I got a TX 950 and have had no trouble ever since. I found voltages to be absolutely stable and well regulated and now my system is rock solid. I don't mind paying a bit more for the quality and warranty. Yes I know it is overkill butfuture upgrades are now open.

16 December 2010, 10:18 PM (2 years ago)report abuse Send to a friend reply

reginald (User):

i use gigabyte power units for all of my units. I cannot see myself rushing out to buy these to replace the units i use now, just to dammed expensive.

17 December 2010, 2:02 PM (2 years ago)report abuse Send to a friend reply

ss-rotel (User):

you get what you pay for brother!

I've used and i know the spec on the gigabyte supplys, i wouldn't touch the entry level. Current on the 12v rails is all wrong

The best thing about the higher end Corsair PSU's is a single, very high current 12v rail.

Not this 18amp per rail max, 4 rails per PSU sort of thing, you find in all the good cheap psu's.

Problem with that, if you end up loading up just 1 rail, cos your setup won't allow any other way, or you just don't know what you doing, you're system will become unstable. (using SATA power adaptors to run 8 HDD's on one strand of power's not a great idea *grin*)

This is a modular PSU, with the ability to run everything off 1 bit of cable, f you so wish, keeping un-wanted cables out of the case. Neater the wire, the cooler the system.



17 December 2010, 5:08 PM (2 years ago)report abuse Send to a friend reply

reginald (User):

I use the gigabyte odin 585w as a standard unit for all my computers and have found them to be a silent, trouble free, well priced unit and you cannot do much better than that.

18 December 2010, 3:19 PM (2 years ago)report abuse Send to a friend reply

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