Corsair AX 1200w ATX PSU Review

Simulated Load Results (Graphs)

Corsair AX 1200w    ATX PSU

Simulated Load Results (Graphs)

For those of you not familiar with the layout of our relatively new graphs, the highest and lowest values on the Y-axis (voltage) represent the maximum and minimum voltages allowed by ATX specifications. If the results should fall outside the graph at any time, then that's an instant FAIL. However, merely staying inside these boundaries does not necessarily indicate a good PSU. In order to display truly great voltage regulation, a PSU must stick as closely as possible to the thick white horizontal line (ideal voltage) as possible.

You will also notice that the graph is split into three sections as depicted by the Green, Amber and Red backgrounds. These indicate normal usage (green), heavily uneven load distribution (amber) and overloading of the PSU (red). For the most part all we need to worry about is how it performs in the green section, but good performance in the other sections will undoubtedly earn the PSU extra brownie points.

For a better understanding of now we conduct our PSU testing and how these results were obtained, please be sure to check out the tabulated results over on the next page.

The +3.3v rail in particular is being used less and less these days with most high current devices relying mostly on the +12v rail and occasionally on the +5v rail. This is reflected somewhat in the results from the AX1200, which while perfectly acceptable and well within tolerances, Isn't quite as tight as it could be.

  

Despite the appearance of a slightly less steep slope on the +5v rail in comparison to the +3.3v one, the actual change in voltage from 327w to 1206w loads is exactly the same. However, given that ATX guidelines give us a window of ±10% on the baseline voltage, the +5v rail has just a little more leeway in either direction and therefore the +5v rail could be stated as having ever so slightly better performance.

Would you look at that +12v rail though. What a sight for sore eyes (I've got hay-fever). The voltage output stays ever so slightly above our 12v baseline throughout all of the tests, and only has the tiniest of downward slants from idle to full load. Even in the max load test is refuses to budge from 12.04v  showing that this really is a PSU for those who are going to be putting some seriously powerful GPU's in their PC's.

Efficiency....boing! That pretty much sums it up, don't you think? 93% at any anything from ~600-900w load and just shy of 90% efficiency when running at its full rated output. The only areas that push the line towards the bottom of the graph is the cross-load TX1 test (heavy load on +3.3/5v) and the max-load test where the PSU is running way outside of specification. Both these tests don't really mimic real life situations - and certainly aren't part of the standard 80PLUS tests. It's mostly me having fun watching PSU's scream for help.

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Most Recent Comments

25-06-2010, 05:44:41

tinytomlogan
Having already given most of the PSU market a good kicking with their HX series, Corsair are once again upping the anti with latest AX series.

Continue Reading

25-06-2010, 07:04:15

killablade
Wow. That is simply amazing!

oh btw you forgot a C in the title

25-06-2010, 08:57:57

F-alienware
Beast.

25-06-2010, 13:21:54

VonBlade
I was lucky enough to see the results prior to it going live.

It is truly epic. With a price-tag to match. Ouch.

But clearly if you want the best...

25-06-2010, 13:25:26

tinytomlogan
I dont think its too bad, the aging HX1000w is still selling for 190, so for all that power and gold efficiency then I dont think its too bad. Just found it at scan for 246 now too.....

25-06-2010, 14:04:43

TH3 H4NGMAN
Am I the only one who finds 6 pcie connectors lacking? Corsair's own 850W unit has 6, which has 30% less power. Antec's 1200W has 8 and the OC edition has 12!

25-06-2010, 14:17:12

Steve-O-
OMG look at the RIPPLE! (Or lack there-of). Awesome stuff! Me want!

26-06-2010, 23:53:21

douglatins
How much!!?!?!???!????

27-06-2010, 03:24:41

Stefan Payne
Have you noticed any electronics noise?

And, well, to the danger of 100A, we don't need to say anything, do we?

28-06-2010, 08:53:57

JN
Quote:
Originally Posted by name='Stefan Payne'
Have you noticed any electronics noise?

And, well, to the danger of 100A, we don't need to say anything, do we?
I cant say that I've heard any unusual noise from the unit. Obviously the PSU testing equipment creates quite a bit of noise its self, but normally PSU's that make high pitched noises stand out above the low-pitched hum of the fans.

As for the single 12v rail, I can see where you're coming from. However I've not heard of any cases where a failure of a single rail PSU was any more catastrophic than a multi-rail PSU. At the end of the day 1200w is 1200w. Even if its split cleverly by OCP, it still has the potential to go wrong. Unless a PSU is physically split (different transformers etc) then it's naive to assume multi-rail is safer.

I did also get a gut feeling that the AX1200 was safer than a lot of other units I've tested before. It handled overloading extremely well and shut down gracefully without me wincing and expecting a *bang*. That is just a gut feeling though.

30-06-2010, 10:38:54

Kartoff
Quote:
Originally Posted by name='TH3 H4NGMAN'
Am I the only one who finds 6 pcie connectors lacking? Corsair's own 850W unit has 6, which has 30% less power. Antec's 1200W has 8 and the OC edition has 12!
I noticed it already and tell Corsair about it at their forum... But it seems after GTX480 hit the shelves everything we know about consumption become history So maybe they want to prevent trying to power quad SLI reducing connectors to 6 though...

30-06-2010, 10:45:57

Stefan Payne
@Jim

I worked as an elictician for a time, so my belly hurts a little (more) when I have to see those 100Amps...

Have you tested the short circuit protection?

As for electronics noise: I tested the Corsair AX1200 on my P4 testsystem (an old FSC D1520 with a 2GHz Celeron) and it had quite notacible electronics noise, haven't tested anything else, though...

@Kartoff

The problem is that the AX1200 hasn't enough modular connectors for more than 7 eight pin PCie connectors, 'cause they're shared with the EPS12V one...

30-06-2010, 10:59:43

Kartoff
I think there are enough place to put 2 more connectors for PCIe so total number will be 8 but they put only 6 and a label

30-06-2010, 11:11:49

F-alienware
Quote:
Originally Posted by name='douglatins'
How much!!?!?!???!????
I suppose you wouldn't care if it was going to run TRI 480 GTX

01-07-2010, 06:48:35

Sihastru
The actual manufacturer of this unit is Flextronics. You know the guys that build videocards.

And what a unit it is. It's the first time since the Antec Signature 850 (a Delta built unit) that I am actually impressed. It looks well engineered, only good quality components used and VERY much attention and care to detail.

This is THE one PSU to have, one PSU to rule them all. Until someone makes a better one... lol.

I also like that they finally sorted out the Ultra patent on modular PSUs, and I see they are getting their license worth.

Anyone knows of another Flextronics PSU out there? Maybe a sister model? We need to keep an eye on this new platform, it's just TOO good.

04-07-2010, 05:47:45

silenthill
I've got the 1000W Corsair 1000HX its running my 920@4GHz and two GTX 480(sli) and 4 hard drives at full load the system draws around 700W and the power supply is cool and quiet I think Corsair are one of the best manufactures in the world and they give you a 5 year warranty I only would consider this new model if I add another gtx480 to my setup but be sure when it comes to power supplies Corsair are number one.

04-07-2010, 21:02:28

AMDFTW
yer corsaor will be my next PSU but 850w

05-07-2010, 03:29:38

tinytomlogan
Quote:
Originally Posted by name='Sihastru'
The actual manufacturer of this unit is Flextronics. You know the guys that build videocards.

And what a unit it is. It's the first time since the Antec Signature 850 (a Delta built unit) that I am actually impressed. It looks well engineered, only good quality components used and VERY much attention and care to detail.

This is THE one PSU to have, one PSU to rule them all. Until someone makes a better one... lol.

I also like that they finally sorted out the Ultra patent on modular PSUs, and I see they are getting their license worth.

Anyone knows of another Flextronics PSU out there? Maybe a sister model? We need to keep an eye on this new platform, it's just TOO good.
Its a Corsair in house patented design so you wont see a sister model dude. Anyone could have built this technically.

05-07-2010, 10:10:32

VTX1800C
I just got me THIS Corsair AX1200 BEAUTY!!!
[/FONT]

1 x Intel Core i7-980X Extreme Edition Gulftown 3.33GHz LGA 1366 130W Six-Core Desktop Processor

3 x ASUS ENGTX480/2DI/1536MD5 GeForce GTX 480 1536MB 384-bit GDDR5 PCI Express (3-way SLI)

1 x Western Digital VelociRaptor WD6000HLHX 600GB 10000 RPM SATA 6.0Gb/s

2 x OCZ DDR3 16000 2000MHZ Triple Memory Module KITS (12 G

1 x ASUS RAMPAGE III Motherboard

1 x NVIDIA 3D VISION GLASSES KIT (AVATAR Bundle)

1 x Alienware OptXTM AW2310 3D LCD Monitor [FONT="Comic Sans MS"]120 HZ BABY


1 x Microsoft WINDOWS 7 ULTIMATE 64-bit

AND MANY MORE GOODIES!!!!....

NOT TO MENTION THIS Corsair AX1200 BABY!!!

I do believe it will not let me down...

LET DA FRAGGIN BEGIN!!!

05-07-2010, 10:25:12

VTX1800C
DID I FORGET to mention Microsoft WINDOWS 7 64-bIT

05-07-2010, 11:06:58

silenthill
Quote:
Originally Posted by name='VTX1800C'
I just got me THIS Corsair AX1200 BEAUTY!!!
[/FONT]

1 x Intel Core i7-980X Extreme Edition Gulftown 3.33GHz LGA 1366 130W Six-Core Desktop Processor

3 x ASUS ENGTX480/2DI/1536MD5 GeForce GTX 480 1536MB 384-bit GDDR5 PCI Express (3-way SLI)

1 x Western Digital VelociRaptor WD6000HLHX 600GB 10000 RPM SATA 6.0Gb/s

2 x OCZ DDR3 16000 2000MHZ Triple Memory Module KITS (12 G

1 x ASUS RAMPAGE III Motherboard

1 x NVIDIA 3D VISION GLASSES KIT (AVATAR Bundle)

1 x Alienware OptXTM AW2310 3D LCD Monitor [FONT="Comic Sans MS"]120 HZ BABY


1 x Microsoft WINDOWS 7 ULTIMATE 64-bit

AND MORE MORE GOODIES!!!!....

NOT TO MENTION THIS Corsair AX1200 BABY!!!

I do believe it will not let me down...

LET DA FRAGGIN BEGIN!!!

If you have a wattmeter could you please measure how much power your pc is consuming when it is in full load.

Regards

05-07-2010, 11:44:10

VTX1800C
I do but is @ WORK.

I will bring it in because that is a great idea...

I believe accordign to all my research on GTX480 that I will consume between 800~900 Watts. The reason i say this is because the GTX480's will draw 300W on a full load (75W 6-pin, 150W 8-pin, 75W PCI-e slot), however, in a 3-way SLI configuration which is what I build, all 3 GTX480 GPU's will never perform at full load because they will devide the demanded load among their GPU's. Which by the way GTX480 3-way SLI (3 GPU's) is much faster and better than ATI HD 5970 CrossfireX (which is actually 4 HD 5870 GPU's). I could give you benchedmark results but you should reaserch on your on so I dont favor my system. I did a bunch of research to decide on the components I bought.

After spending all this $$$ into this High-End GAMING machine I really do not care about the electric bill, which I pay by the way.

I just got tired of playing the new games on 10 year old technology.

05-07-2010, 11:47:10

VTX1800C
Quote:
Originally Posted by name='silenthill'
If you have a wattmeter could you please measure how much power your pc is consuming when it is in full load.

Regards
I do but is @ WORK.

I will bring it in because that is a great idea...

I believe accordign to all my research on GTX480 that I will consume between 800~900 Watts. The reason i say this is because the GTX480's will draw 300W on a full load (75W 6-pin, 150W 8-pin, 75W PCI-e slot), however, in a 3-way SLI configuration which is what I build, all 3 GTX480 GPU's will never perform at full load because they will devide the demanded load among their GPU's. Which by the way GTX480 3-way SLI (3 GPU's) is much faster and better than ATI HD 5970 CrossfireX (which is actually 4 HD 5870 GPU's). I could give you benchedmark results but you should reaserch on your on so I dont favor my system. I did a bunch of research to decide on the components I bought.

After spending all this $$$ into this High-End GAMING machine I really do not care about the electric bill, which I pay by the way.

I just got tired of playing the new games on 10 year old technology.

05-07-2010, 12:55:04

silenthill
Quote:
Originally Posted by name='VTX1800C'
I do but is @ WORK.

I will bring it in because that is a great idea...

I believe accordign to all my research on GTX480 that I will consume between 800~900 Watts. The reason i say this is because the GTX480's will draw 300W on a full load (75W 6-pin, 150W 8-pin, 75W PCI-e slot), however, in a 3-way SLI configuration which is what I build, all 3 GTX480 GPU's will never perform at full load because they will devide the demanded load among their GPU's. Which by the way GTX480 3-way SLI (3 GPU's) is much faster and better than ATI HD 5970 CrossfireX (which is actually 4 HD 5870 GPU's). I could give you benchedmark results but you should reaserch on your on so I dont favor my system. I did a bunch of research to decide on the components I bought.

After spending all this $$$ into this High-End GAMING machine I really do not care about the electric bill, which I pay by the way.

I just got tired of playing the new games on 10 year old technology.
Im just curious because Ive got two GTX 480 and CORE I7 SYSTEM at full load it consumes around 700 watts my power supply is the 1000W Corsair 1000HXUK so if I add another GTX 480 would my power supply be capable of handling the load.

05-07-2010, 13:13:17

VTX1800C
Quote:
Originally Posted by name='silenthill'
Im just curious because Ive got two GTX 480 and CORE I7 SYSTEM at full load it consumes around 700 watts my power supply is the 1000W Corsair 1000HXUK so if I add another GTX 480 would my power supply be capable of handling the load.
The 12V rail on any 1,000W PSU is not capable of 3 GTX480 GPU's, the Corsair AX1200 shuts off at about 2 minutes of 1,500W-1,600W overload (continous). This is in a test lab over testing these units. That said, any 1,000W PSU would probably shut down when using 3 GTX480 GPU's, not to mention the i7 Core processor and any extra drives you proly have.

To avoid any damage to your system I recomend that you do upgrade your PSU.

There are many out there from 1,200W-1,600W.

Any 1,200W PSU is enough to power 3 GTX480 GPU's + Intel i7 + any drives you have.

I chose Corsair AX 1,200W because of its QUALITY.

AND ITS EFFICIENCY @ LOWER LOADS (any load of maximun 10%, 25%, 50%, 75%, 80%) ITS AMAZING!!! = less power cosumption = less $$$ on electric bill.

BTW,

if you research the diference between 2-way SLI vs 3-way SLI the results are improved on many games/tests/graphics.

>ONLY DO UPGRADE to 3-way SLI (3 GTX-480) if you play games that demand the hardware power.<

I say this so you dont spend the xtra $$$ if you really dont need it.

05-07-2010, 13:51:38

VTX1800C
Quote:
Originally Posted by name='silenthill'
If you have a wattmeter could you please measure how much power your pc is consuming when it is in full load.

Regards
Results in...

3 GTX480 GPU's in 3-way SLI @ full load = 937 Watts x 0.89% efficiency = ~834 Watts (actual)

GPU Operating temperature @ full load = 96 C

05-07-2010, 14:37:28

silenthill
Quote:
Originally Posted by name='VTX1800C'
Results in...

3 GTX480 GPU's in 3-way SLI @ full load = 937 Watts x 0.89% efficiency = ~834 Watts (actual)

GPU Operating temperature @ full load = 96 C
thanks for effort great stuff

08-07-2010, 12:46:01

silenthill
I cant understand why Corsair didnt go for 1500w especially with 4 SLI arriving and the huge power consumption of the new Nvidia GPUs.

18-07-2010, 08:02:28

Elemental_Dragon
Looks absolutely stunning! Very impressed with how Corsair has improved their PSU's over the years (I never used to be a fan but that's simply beautiful!)

The black wiring is something I wish more comapnies would do!

~Bex

12-11-2010, 14:03:21

dMITIj
Quote:
Originally Posted by VTX1800C View Post

Results in...

3 GTX480 GPU's in 3-way SLI @ full load = 937 Watts x 0.89% efficiency = ~834 Watts (actual)

GPU Operating temperature @ full load = 96 C
Thats fine, but how mutch of an OC didt you do on your CPU? Because 480GTX @ Tri SLI is one thing but when you have that much of GPU-power you will need a OC at around 4400Mhz on the CPU and how does the power drawing look then?

the reason im asking is that i can't find out what to buy, Corsair AX1200w ore the Silverstone Strider 1500w?

12-11-2010, 14:58:20

AMD_PBz
Are you planning to run 3 or 4 way sli? what are your needs?

Albeit the Silverstone provides more power the Corsair is more efficient

I would be looking at do you need all that or are you after it for bragging rights?

13-11-2010, 07:47:45

dMITIj
im aware of that, thats why i ask, ill be running at 2560x1600 in games, photo edt. 3D work ect. and ill be overclocking my system, CPU @ 4400Mhz and the 480GTX im not sure yet, but they will be OC'ed, and i will also have my 480GTX's watercooled in an 2. loop.

im not that kind of type that need to be bragging, im 33 years old i have kids and a wife hehe

13-11-2010, 09:24:25

AMD_PBz
That explains it .

are you in North America or Europe?

If you are in North America AX1200 is on sale with MIR!

13-11-2010, 10:26:39

dMITIj
Quote:
Originally Posted by AMD_PBz View Post

That explains it .

are you in North America or Europe?

If you are in North America AX1200 is on sale with MIR!
hehe, im in Europe (Denmark) The Silverstone Strider is 460$ here and the Corsair is 360$.

13-11-2010, 10:49:36

AMD_PBz
Well there's your answer Here in Canada $269 + tax or 259 after $20 MIR

13-11-2010, 13:35:11

dMITIj
Quote:
Originally Posted by AMD_PBz View Post

Well there's your answer Here in Canada $269 + tax or 259 after $20 MIR
So you will go with?

13-11-2010, 14:33:19

AMD_PBz
short term loss @ $269 by far

11-02-2011, 07:52:40

cinek2
are the cables long enough to go behind the mobo in nzxt phantom (full tower)?

15-03-2011, 09:09:26

The Terrible Puddle
Possible to sleeve those cables individually?

15-03-2011, 09:52:41

Zeals
Quote:
Originally Posted by The Terrible Puddle View Post

Possible to sleeve those cables individually?
They already have Corsair sleeving, which is really high quality, the only reason to change the sleeving is if you want to put UV ones. So don't bother

15-03-2011, 15:37:16

The Terrible Puddle
Quote:
Originally Posted by Zeals View Post

They already have Corsair sleeving, which is really high quality, the only reason to change the sleeving is if you want to put UV ones. So don't bother
I'm gonna build a new rig soon and I've thought the Corsair AX850, and I wanna do a nice job by sleeving each wire individually. But those capacitors or things at the end of the PCI-E cable looks to be a problem.

Or am I wrong?

25-08-2011, 17:11:46

Judderman
Enuff said, this will be going in my new build

The gold award from Jim and the fact its fully modular means i can sleeve all he cables i need without voiding the bloody 7 year warranty lol....friggin 7 years u gotta love a bit of that!

25-08-2011, 17:50:35

shyguy094
Geez. That's a great PSU. I bet you could do quad 580s on that. Maybe a little OC, probably none though. 976W GPUs (4 x 244W) alone is crazy. I kinda want one now.

26-08-2011, 09:44:34

yassarikhan786
Awesome PSU and Review.

03-09-2011, 11:45:57

Natashaful
Being a 1200AX and 850AX owner i can honestly say this is one of the best items to get with a new system.. Think how stable and clean your power will be to help you get everything overclocked
Reply
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