Corsair HX620 620w Modular PSU

Testing

Load Testing

In order for the results from all current and future PSU reviews to remain fair and comparable, Overclock3D uses a custom built Power Supply load stress tester. The tester will be placing the following loads on each of the HX620's rails:

  Idle Load
+3.3v Rail
10a20a
+5.0v Rail
10a20a
+12v Rails
10a10a x3

As some power supplies produce obscure voltage outputs when running with 0% load, the Idle testing simulation will be produced by placing each rail under a small load similar to what would be expected from a mid-range PC. Load testing results are obtained by placing the unit under the maximum load selectable on the OC3D equipment without tripping the OLP (Over Load Protection) on the power supply.

Corsair HX620 +3.3v Corsair HX620 +5.0v

Corsair HX620 +12v

Both the +3.3v and +5.0v rails remained well within ATX specifications throughout the testing, with the +5v rail exhibiting the most droop at 0.07v - still a very respectable result for any PSU placed under heavy load.

During the +12v load testing, each of Corsair's three rails (rated at 18amps) were placed under a total load of 30 amps. As a result of this, each rail produced the same voltage output results across the board and therefore only necessitated a single graph as shown above. With a maximum voltage fluctuation of 0.02v, the HX620 shows that it is more than capable of producing stable power to any medium/high-end SLI or Crossfire setup.


Efficiency Testing

Efficiency tests are performed by measuring the wattage consumed by the power supply at the mains against the power (in watts) consumed by the OC3D power supply stress tester. These results may not be 100% accurate, but have proven to be extremely close to results obtained from professional equipment.

Corsair HX620 Efficiency Idle Corsair HX620 Efficiency Load

At idle the HX620 was placed under a total load of 203 watts with a recording of 253 watts consumption being obtained from the mains. Therefore the efficiency of the HX620 at idle worked out to be 80.2%.

Increasing the load on the unit produced even more favourable results, with the HX620 managing 83.8% efficiency when being placed under a total load of 646 watts.


Noise Testing

Possibly the hardest part of any PSU review is summarising the level of noise given out by the unit. The threshold for what is considered 'noisy' varies from person to person and therefore what I may consider a quiet unit, another person may consider extremely loud. A common way to resolve this issue is to use a dBA meter to measure the units noise level, however this doesn't take into account the pitch (type) of noise emitted and whether it is likely to irritate end users.

For this reason OC3D records all power supplies at idle and load in wav format for you to make your own informed decisions. All recordings are taken at 30cm away from the PSU and outside of a PC case. You will need to remember that noise levels will be reduced by varying amounts once the PSU has been installed inside your PC enclosure.

Idle Recording - Download
Load Recording - Download

At idle the HX620 was extremely quiet with the 120mm fan running at a very low RPM. As the load on the unit was increased, the fan gradually gained speed in order to counteract the extra heat produced by the PSU's components. Even at full load the HX620 managed to keep a good balance between the noise and heat output of the unit, proving that Seasonic's implimentation of a 60mm fan on their M12 PSU was not necessarily required.

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Most Recent Comments

27-11-2006, 09:57:59

JN
"Corsair have made a brave branch out from the memory market into their own line of PSU's. Today I'll be putting their HX620 through its paces to see if it lives up to Corsairs reputation for high performance components."

Linkage

27-11-2006, 10:05:17

Ham
Had a quick flick though. Another good job Mr XMS.

Seems very pricy to me though.

27-11-2006, 10:19:56

Mr. Popo
oO0o... very nice!

Price?

27-11-2006, 11:10:28

Ham
Quote:
Originally Posted by name='Mr. Popo'
Price?
Read the review, its in there.

27-11-2006, 11:24:35

Mr. Popo
Quote:
Originally Posted by name='Ham'
Read the review, its in there.
I've read it twice, nothing...

Can I see a quote?

27-11-2006, 11:28:06

JN
Quote:
Originally Posted by Mr. Popo
I've read it twice, nothing...

Can I see a quote?
"For a ~600w unit the sum of £96 (over at Scan.co.uk) may seem a little higher than most other competing products, however as the saying goes - "You get what you pay for", and this is certainly true for the HX620."

27-11-2006, 11:37:27

Mr. Popo
Quote:
Originally Posted by XMS
"For a ~600w unit the sum of £96 (over at Scan.co.uk) may seem a little higher than most other competing products, however as the saying goes - "You get what you pay for", and this is certainly true for the HX620."

Oh... OK!

I was looking for $$$.

28-11-2006, 07:39:58

kimandsally
Quote:
Originally Posted by Ham
Had a quick flick though. Another good job Mr XMS.

Seems very pricy to me though.
I compare it to the Enermax Liberty as I've had the 620 and currently have the Corsair 620, to me the Corsair is a lot better the cable system is much more usable and the noise is in another league I honestly cannot hear it on idle load unless I put my ear 8" away from it, even under load it remains the quietest PSU I've "never heard".

Another thing to add is the 5 year warranty has to be worth something extra, I rate it very highly and I have had or built PC's for other people dozens of different PSU's.

PS Very nice review as usual XMS.

28-11-2006, 08:08:26

FragTek
Great review Jim. And I must say that is a beastly ass PSU. I'm actually going to look at putting one of these babies in my rig... I absolutely love the cables that they've used, those are just stellar. Off to find one in the USA

28-11-2006, 08:24:22

kimandsally
Hi Frag, I'm sure you will be pleased with it the cables are a nice touch if you like them, they are slightly stiff but they are easy to bend and move around will make your case look great.

Another great feature is it's quiet operation, in my humble opinion only the Etasis 750 850 Sliverstone series are better, the downfall of those for me are the noise and not being modular.

I hope when you get yours your as pleased as I am with mine.

28-11-2006, 08:41:50

FragTek
Quote:
Originally Posted by kimandsally
Hi Frag, I'm sure you will be pleased with it the cables are a nice touch if you like them, they are slightly stiff but they are easy to bend and move around will make your case look great.

Another great feature is it's quiet operation, in my humble opinion only the Etasis 750 850 Sliverstone series are better, the downfall of those for me are the noise and not being modular.

I hope when you get yours your as pleased as I am with mine.
Thanks! I'm sure I'll be a happy camper once I find one I'm not all too terribly worried about the noise levels as I've got a couple of noisy 120's inside the Vapo case which will probably outnoise the PSU, hehe. I am looking quite hard @ the SS psu's as well, but I'm really really liking the cables they've used on the Corsair.

28-11-2006, 08:46:46

llwyd
performance looks great but im not too keen on the looks. looks more like a server psu than a high end desktop job. nice review either way

28-11-2006, 08:49:41

FragTek
The looks are perfect for my case... Black & red all the way. Black mobo, red CCFL's, black Vapo hose. I think it would look wicked-sick in my case. I think that is going to vary by user however, such is llwyds case.

28-11-2006, 09:12:46

kimandsally
Quote:
Originally Posted by name='FragTek'
Thanks! I'm sure I'll be a happy camper once I find one I'm not all too terribly worried about the noise levels as I've got a couple of noisy 120's inside the Vapo case which will probably outnoise the PSU, hehe. I am looking quite hard @ the SS psu's as well, but I'm really really liking the cables they've used on the Corsair.
Don't know what the price would be but I would send you one from the UK if your stuck.

28-11-2006, 18:20:31

FragTek
Quote:
Originally Posted by name='kimandsally'
Don't know what the price would be but I would send you one from the UK if your stuck.
Thanks for the offer! I'm sure I'll be able to find one when the time comes, don't think i wanna upgrade right this minute.

28-11-2006, 19:12:21

WC Annihilus
It's currently in stock at ZZF right now ($10 rebate too): http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=373110&prodlist=pricegrabber

28-11-2006, 20:36:08

glocktodahead
Also in stock here http://www.ncix.com/products/index.php?sku=19831&vpn=CMPSU-620HX&manufacture=CORSAIR

Canadian site, so you could pick it up pretty cheap

04-12-2006, 18:03:44

Toxcity
It looks abit sexy!

Same about the price..

03-02-2007, 21:04:10

Raven

During the +12v load testing, each of Corsair's three rails (rated at 18amps) were placed under a total load of 30 amps. As a result of this, each rail produced the same voltage output results across the board and therefore only necessitated a single graph as shown above.

and the reason for this is that it has 1 big 12v rail and not 3 different 12v rails.

all 3 rails gets their power from a single transformer and the rails are not differented on pcb level but more on the wire level.

one reviewer asked corsair about this and received this explanation.

For this, Corsair sent us this explanation: “Since our PSU follows the latest Intel design spec, it is consider an UL Level 6 design, which means there is no 240VA limitation on the +12V rails. In addition, all the +12V rails are drawing from single transformer, the rail separation is not done on the PCB side, but on the wiring side. Therefore the +12V1 and +12V2 you see on the PCB doesn't really mean anything.”

another reviewer loaded one single rail with 40a and didnt notice any drop in V or any other problems such as overcurrent shutoff.

23-03-2007, 07:05:49

Mr. Smith
This is an amazing PSU!

Although it is not a new product it was showcased at CeBIT 07 powering a monster system - a watercooled, overclocked quad FX with 8800GTS SLi, 4gb of OC'd ram and a 150gb raptor plus the usal bits and pieces...

All on 620w!

Link I know it's the Inq but it is true!

09-07-2007, 08:57:58

Nemesis
I'm looking at getting a Lian Li V1000B soon and was wondering if anyone has tried fitting a Corsair HX620 in one of these. I know from the specs that the PSU is physically small enough to fit, but is there enough space for the modular connectors and cables to be routed?

Anyone tried or seen this configuration, thanks for any info.

For those interested im looking at making something along the lines of:

Lian-Li V1000B

Corsair HX620W

Core 2 Duo E6600

Thermalright U-120 Extreme

Asus Striker Extreme

2Gb Corsair dominator

XFX 8800GTX 768MB

X-Fi Elite Pro

Adaptec 3805 (8chan PCIe raid)

4x 500GB Seagate 7200.10 (Raid 5)

1x 150 GB Raptor

Dell 2407WFP

09-07-2007, 09:04:13

JN
I can't imagine you'd have any problems at all really. The PSU is a fairly standard size and the modular connectors only add a couple of mm to the size. In fact, they are probably the smallest footprint modular connectors of almost all modular PSU's

09-07-2007, 09:10:08

Nemesis
Indeed, i don't expect there to be any problem really, just want to be sure. I know the V1000 is notorius for PSU fit problems as it has an aluminium wall between PSU and HDD enclosures that makes any oversized PSU a no. Just wanted to check that the extra size added by the modular cable connectors wasn't going to push me just over size

09-07-2007, 09:21:23

Ham
Get the dremel out if there is any issues.

Nice spec you got there btw, 2TB

09-07-2007, 10:17:38

Nemesis
Quote:
Originally Posted by name='Ham'
Get the dremel out if there is any issues.

Nice spec you got there btw, 2TB
Hehe, would rather not have to take a dremel to it if i can help it

Last case was a custom modded H2O cooled Lian Li PC70 with a 120x240 radiator modded into the top panel, self built custom FanBus, window, Cathodes etc. Hoping to keep this one nice and plain and simple as I dont really have the time and workshop space these days to do this kind of work

Well 1.5Tb once you take raid into account (less due to native drive sizes etc)

Should be about 1.6Tb once you add on the 150Gb raptor system drive.

Last system I have was built some time ago now:

Barton 3000

1Gb Ram

Ati 9800pro

640Gb Hdd

So its about time I treated myself .

Probably be another month till I have the spending money together to pull this off, so will likely have changed a bit by then anyway.

22-08-2007, 11:19:42

pja123
After reading this review i went out and purchased one - stuck it in my new build last night!

http://upload.overclock3d.net/get.php?id=3606

22-08-2007, 11:32:23

Azreil_2
^^ iv got two sitting next to me waiting for the rest of the pc!!! (they were on a deal at komplett ^^)

22-08-2007, 11:38:16

pja123
Why how much were they, how come you purchased two?

22-08-2007, 11:41:19

Azreil_2
£80 each, and i got two as im building my own rig this/next week plus my brothers (and another two within the month, if not at the same time lol)

13-11-2007, 17:43:02

node159
Something to consider when picking up a Corsair PSU:

The VX-550, and the TX-750 are not Seasonic built, they are build by Channel Well(CWT). They seem to be just as good quality, although they are not as quiet as the Seasonic built models(VX-450, HX-520, HX-620 and TX-650)





From the whirlpool forums

http://forums.whirlpool.net.au/forum-replies.cfm?t=858908&r=13612187#r13612187

13-11-2007, 17:45:17

node159
Quote:
Originally Posted by name='node159'
Something to consider when picking up a Corsair PSU:

From the whirlpool forums

http://forums.whirlpool.net.au/forum-replies.cfm?t=858908&r=13612187#r13612187
And the prices reflect that!

Reply
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