5-way High-End 1KW+ PSU Round-Up

Corsair HX1000W

Corsair HX 1000W
Corsair is a name that many enthusiasts will recognise as being one of the most respected memory manufacturers' in the industry. In 2006 they made their first entry into the PSU market with the HX620. Based on internals by Seasonic with some customisation by Corsair, the HX620 was a massive hit, winning awards worldwide. In fact, the HX620 was such a success that to this day it is one of the most recommended mid-range PSU's on the market.
Based on this success Corsair were obviously quite keen to make an equally good impression on the high-end market. However, with such a high standard being set for their HX620 the pressure was on not to disappoint power hungry Quad-SLI and CrossfireX enthusiast community. With this in mind Corsair made a switch from Seasonic as their OEM, over to CWT (Channel Well Technology) who are responsible for making some of the best PSU's in the industry.
Using CWT's 1200w Power Plus unit as the base for their new PSU, Corsair not only understated the power output of their new HX PSU by simply labelling it as "1000w", but also improved on the existing CWT components by specifying higher quality capacitors along with several other smaller upgrades and tweaks. This all certainly sounds impressive, but we'll see just how much of a difference it's made over on the testing page.
Corsair HX1000 Specs
Corsair HX 1000W Box Front Corsair HX 1000W Box Back
Corsair HX 1000W Box Open Corsair HX 1000W Contents
The HX1000 comes in a rather long double walled cardboard box that actually got us quite worried as to just how long the PSU would be once we'd unpackaged it. Thankfully on opening the box our fears were alleviated by a large quantity of Styrofoam padding along with a collection of cables and accessories neatly tucked at the end of the box.
Corsair HX 1000W Bottom Corsair HX 1000W Top
Corsair HX 1000W Back Corsair HX 1000W Side
Out of the PSU's we've covered so far in this review, the HX1000w is definitely the most professional looking of the bunch.  With a matt black, slightly coarse powdercoated finish along with blue specification stickers, there's something about the HX1000W that makes it stand out for wanting to do exactly the opposite.
Corsair have made full use of all available space and have opted for a 135mm fan. As with all PSU's of this design, the air is drawn up from inside the PC case, pushed over the heatsinks inside the PSU and allowed to exit out the back of the unit via a meshed grill.
Also worthy of a mention is the absolutely huge power switch used on the unit. While most manufacturers' tend to skimp and save, using rocker switches that look like they were stolen from a school electronics project. The switch used on the HX1000 looks more than capable of dealing with the extremely high current that this unit will be pulling from the wall socket under heavy load.
Corsair HX 1000W Front Corsair HX 1000W Modular Plugs
Corsair have kept the modular connector system extremely simple: PCI-E cables go in the blue sockets, everything else goes in the black ones. In addition, a small sticker detailing which of the two +12v rails each of the sockets is connected to internally; makes the decision of where to insert the modular plugs even easier.
Corsair HX 1000W Cables Corsair HX 1000W PCI-E
Corsair HX 1000W Wires Corsair HX 1000W ATX
The collection of modular cables is plentiful, and certainly far more than you could plug into the unit all at the same time. However, what really sets the HX1000's cables apart from those used on the rest of the modular units in this review is the total lack of sleeving.
Rather than opting for the cumbersome and often untidy look of fabric mesh finished off with heatshrink and cable ties, Corsair have decided to use black wires arranged in a ribbon cable style. This not only makes routing of the cables around the inside of the PC much easier, but also looks extremely cool.
Unfortunately the ATX, P4-12v and EPS12v cables hard wired into the unit don't follow the clean look of the modular cables and are sleeved in much the same way as the rest of the units on review. We can only assume that this is because the sleeveless modular cables are something that are added by Corsair after the unit has left the CWT factory.
Corsair HX 1000W Inside Corsair HX 1000W Dual Caps + Transformers
Corsair HX 1000W Modular Corsair HX 1000W Power Filter
Looking inside the HX1000, the layout of the internal components is so distinctive that it is instantly recognisable as coming from the same OEM that Thermaltake also use for their 1.5kw Toughpower series. However, if we compare the Toughpower unit side-by-side with the HX1000 it is clear to see that Corsair have not only upgraded the capacitors, but also changed over the transformers, upgraded the cooling and made several slight alterations to the layout as well.
What makes the unit so unique is that it is essentially two 500w PSU's placed side-by-side. This means that each of the two  +12v rails in the unit is powered by a totally independent circuit, offering unmatched stability. Not only this, but Corsair have also assigned one of the circuits to power the +5v rail, and another to power the +3.3v rail, once again offering much greater stability than any single circuit power supply could provide.
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Most Recent Comments

03-10-2008, 09:03:52

"Looking for a new 1kw+ PSU? We test Be-Quiet, Corsair, Cooler Master, Enermax and Silverstone's latest and greatest units on the most sophisticated equipment."


5-way High-End 1KW+ PSU Round-UpQuote

03-10-2008, 09:19:16

Great round-up review Jim. Shame about the Be-Quiet though, was really hoping for great things from them Quote

03-10-2008, 09:34:14

WC Annihilus
Mmm... I got one of those CM UCP 1100W that I won at Nvision sitting in a box brand new. Really need to get around to selling it >.> Maybe linking this review will net some interestQuote

03-10-2008, 09:34:27

The Corsair HX 1000W looks brilliant.

Nice review, enjoyed reading it. Quote

03-10-2008, 11:14:34

Ooh, that enermax looks nice!Quote

03-10-2008, 11:22:35

Originally Posted by name='teknokid'
Ooh, that enermax looks nice!
Hope you mean the revised version


03-10-2008, 11:38:02

they all look rather nice

but isnt 1k overkill for all but the highest of high end systems now? Quote

03-10-2008, 11:39:05

Originally Posted by name='Jim'
Yeah :P

Its quite a design change, but does look pretty awesome.. Nice review Quote

03-10-2008, 12:07:13

I like the look of that revolution ^^. Only thing is, my PSU sits at the top of the case, so it would look a bit stupid to have the writing upside down. Is it t'other way up on the other side?

Nice review tho, but real shame about the be-quiet, at least there are some really good alternatives now.Quote

03-10-2008, 13:46:25

Nice review. The link for the PCP&C TurboCool on the first page is broken tho, it takes u to the Silverstone Zeus 750W review. I don't think I will need one of these PSUs until 2000W is the standard for extreme high-end with the hardware I tend to use lol.Quote

03-10-2008, 15:18:01

Seriously good review. U just dont see these sort of tests done enough. Saw some old tests similar to this that came to the conclusion that power ratings were extremely exaggerated (the spelling thing says I spelt it right ??). That was b4 we had efficiency ratings and such standards. Reaching 1kw on a cold day in a lab once, no longer cuts it.

I'll post a few exceptions I have:

  • I wouldnt 'con' the Silverstone psu for being longer. If u have a smaller case with this psu - theres other wrongs being committed.

  • I'd like to massage into the graphs the +/- lines that the ATX standards perceive for the voltage levels. If a psu varies a fair bit, but remains within that +/- by a %, I think that's another criticism of the units.

  • If u dont have 4 way sli or 20 hdd and everything overclocked, including the usb line, I want a serious answer as to why u have a 1kw+ psu. Yet alone paid over £150 for it. £150 is a good mark up for Corsair. The Silverstone is massively priced.

Cut the price on the CoolerMaster one and it'd be awesome over-poweredness for the price. Corsair seems to be the banker tho.


04-10-2008, 15:25:24

Fantastic review as usual Jimbo, some sexy PSU's there and just goes to show that OC3D REALLY tests stuff Quote

04-10-2008, 18:33:46

fantastic comparative review, i was a little disappointed by the be quiet mind. wish you'd written this a month ago Quote

04-10-2008, 18:39:02

Originally Posted by name='ionicle'
they all look rather nice

but isnt 1k overkill for all but the highest of high end systems now?
Yea unless youre like me and are developing a peripheral toaster that runs off the PSU Quote

04-10-2008, 19:00:02

Originally Posted by name='llwyd'
Yea unless youre like me and are developing a peripheral toaster that runs off the PSU

"the USB toastomatic" Quote

05-10-2008, 10:22:57

haha, What sort of equipment is used to test psu's?Quote

05-10-2008, 10:49:44

Originally Posted by name='teknokid'
haha, What sort of equipment is used to test psu's?
If you actually read the review it tells you...Quote

05-10-2008, 11:36:16

Originally Posted by name='Ham'
If you actually read the review it tells you...
ooh, I only looked at the end and the enermax revolution :SQuote

05-10-2008, 16:13:33

Originally Posted by name='ionicle'

"the USB toastomatic"
How did you get hold of my secret latest invention plans? That was due to be unveiled next year...Quote

07-10-2008, 16:34:37

Hah you guys crack me up some times.. seriously

Great review, not that I'll be in the market for a PSU like that for a long time but it is really worth knowing that kind of information. Nicely tested, shows (as stated before) OC3D really go to the inth degree to test and make their reviews as accurate as possible!

Thanks guys Quote

08-10-2008, 05:21:56


Well powerfull PSU's needn't run on max to provide the juice needed and hence can run cooler... But ..


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