Corsair HX750w (750w) ATX PSU

Introduction & Specifications

Introduction
 
CorsairIt's very rare that you get the best of everything all in one package. Supercars break down more than the family estate, busty blondes are rarely as intelligent as the petite brunettes and PSU's tend to be either powerful yet noisy, efficient yet unstable or in some cases, just rubbish all together. However, A short while ago here on OC3D we checked out one of two new PSU's in Corsair's immensely popular HX line-up. The HX850w, to put it simply, was an all-round stunner. Solid rails, extremely high efficiency, virtually non-existent ripple and great looks to boot. For the first time ever, you really could have your cake and eat it while driving along in your extremely reliable Lamborghini with your big breasted blonde (who happens to have a degree in engineering) sitting beside you.
 
So when several weeks after the initial review Corsair dropped us an email asking if we'd like to take a look at the 750w model, naturally we agreed.  Being released at the same time as the HX850w an educated guess would tell us that both PSU's are more or less identical probably barring some slightly uprated components in the 850w version. With this in mind we're going to be skipping past a lot of the usual waffle regarding the packaging and appearance of the HX750w and concentrating more on the performance of the unit and any differences that present themselves along the way. Of course, if you haven't yet already checked out our full and extremely detailed review of the HX850w, now is the time to do so!
 
• Guaranteed to sustain its full rated wattage at an ambient temperature of 50°C
• Up to 90% energy-efficiency under real-world load conditions
• 80PLUS Silver Certification
• Single +12V rail design providing up to 62A
• Multi-GPU ready
• 105°C solid state capacitors
• Active Power Factor Correction (PFC) with PF value of 0.99
• Supports ATX12V 2.3 and EPS12V 2.91 standards. Backwards compatible with ATX12V 2.01
• Auto switching circuitry for universal AC input from 90-264V
• Over Current/Voltage/Power Protection, Under Voltage Protection and Short Circuit Protection provide complete component safety
• Dimensions: 150mm(W) x 86mm(H) x 180mm(L)
• MTBF: 100,000 hours
• Safety Approvals: UL, CUL, CE, CB, FCC Class B, TÜV, CCC, C-tick
 
During our initial review of the HX850w we received word that the unit had actually met 80PLUS Gold standards. However as the unit barely scraped past the requirements for meeting this certification (>87% at all loads), Corsair took it upon themselves to downgrade both the HX750w and HX850w PSU's to Silver certification. Therefore the difference in 80PLUS ratings between our initial review and this one are merely cosmetic, and does not suggest any physical differences between the PSU's. All other specifications seem pretty much identical aside from the slightly lower power output on the 12v rail which can be seen below:
 
Corsair HX750w Rail Layout
DC Output +3.3V +5V +12V1 +12V2 +12V3 +12V4 +12V5 +12V6 -12V +5VSB
25A 25A 62A - - - - - 0.8A 3A
Max Power 150W 744W 9.6W 15W
750W
 
Corsair HX850w Rail Layout
DC Output +3.3V +5V +12V1 +12V2 +12V3 +12V4 +12V5 +12V6 -12V +5VSB
25A 25A 70A - - - - - 0.8A 3A
Max Power 150W 744W 9.6W 15W
750W
 
With an 8A difference between the +12v rail on the HX750w and HX850w, this more or less explains the 100W deficit (8A x 12v = 96W) of the HX750w, once again implying that both of the units are more than likely 'the same' with just some minor changes inside. However, let's move over to the next page and actually open up the HX750w to find out for certain.
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Most Recent Comments

27-08-2009, 15:40:15

JN
"After being blown away with the performance of the HX850w back in June it's time to fire up the OC3D load tester once more and see if HX750w can leave an equally good impression."

http://www.overclock3d.net/gfx/artic...135807159s.jpg

Corsair HX750w (750w) ATX PSU

27-08-2009, 16:06:57

Rastalovich
Corsair have definitely moved up to one of 'the' psus I look for when pondering a shopping cart. Having also had a few questionable situations with psus other people had praised for years.

Great stuff, just like the 850.

27-08-2009, 16:56:18

Hope
I am convinced, will be investing very soon

Thanks for such a good review

27-08-2009, 17:43:15

tinytomlogan
Quote:
Originally Posted by name='Hope'
I am convinced, will be investing very soon

Thanks for such a good review
*cough cough* Told ya

29-08-2009, 08:16:42

Kylevdm
I have just installed on of these in my PC although, I almost died at the smell of new plastic from the bags when I opened it, at least I knew it was brand new!!! Great piece of kit, very quiet as well!

29-08-2009, 08:33:11

JN
Quote:
Originally Posted by name='Kylevdm'
I have just installed on of these in my PC although, I almost died at the smell of new plastic from the bags when I opened it, at least I knew it was brand new!!! Great piece of kit, very quiet as well!
I have a fetish for that smell....mmmmm I can smell it now

29-08-2009, 10:09:04

Kylevdm
Quote:
Originally Posted by name='Jim'
I have a fetish for that smell....mmmmm I can smell it now
would explain a few things :P

30-08-2009, 19:36:44

Bungral
One of these will be making it's way into ma ATCS very very soon as I have it sitting here... Just need to order a few more parts.

Quite like that the PCI-E's aren't hard wired.

05-09-2009, 05:52:14

Hope
Think I will get one of these today Exciting

05-09-2009, 06:07:00

JN
Quote:
Originally Posted by name='Hope'
Think I will get one of these today Exciting
You wont be disappointed

05-09-2009, 16:02:14

clone38
Just picked up the 850 one of this psu,dam it`s sexy

08-09-2009, 15:01:15

Hope
Quote:
Originally Posted by name='clone38'
Just picked up the 850 one of this psu,dam it`s sexy
I have the 750 sat here now, wondering whether I should have got the 850 though :s

Help! Please! lol

08-09-2009, 15:38:10

JN
Quote:
Originally Posted by name='Hope'
I have the 750 sat here now, wondering whether I should have got the 850 though :s

Help! Please! lol
Whats your specs? If it helps, the 750w can hold a 880w load constantly at 50c

08-09-2009, 15:57:19

Hope
Quote:
Originally Posted by name='Jim'
Whats your specs? If it helps, the 750w can hold a 880w load constantly at 50c
It isnt the load, it is stopping the fans from stepping up above the 70% load limit

It is a Q6600 @ stock, Radeon 4850, 4 HDDs, USB KB/Mouse, 4 120mm Fans, 2 DVD RWs, ASUS P5E, 2 STICKS DDR 2

08-09-2009, 17:15:46

Kylevdm
The 750 is more then enough for that

08-09-2009, 17:49:35

JN
Quote:
Originally Posted by name='Kylevdm'
The 750 is more then enough for that
Yeah the the HX750 isnt even going to break a sweat (y)

08-09-2009, 18:11:36

VonBlade
At the risk of a thread hijack, what would roughly be the damage on a OC 920, P6T, 6GB, 3SATA, GTX275??

I tried a few online things and have had everything from 400w to 1050w(!) come up. Was planning on a 850 to keep things cool but the 750 does look tempting.

Thanks if you can.

09-09-2009, 02:41:35

PeterStoba
Quote:
Originally Posted by name='VonBlade'
At the risk of a thread hijack, what would roughly be the damage on a OC 920, P6T, 6GB, 3SATA, GTX275??

I tried a few online things and have had everything from 400w to 1050w(!) come up. Was planning on a 850 to keep things cool but the 750 does look tempting.

Thanks if you can.
Surely the 750 would be enough, even a 600w would I reckon...

09-09-2009, 06:18:23

JN
Quote:
Originally Posted by name='VonBlade'
At the risk of a thread hijack, what would roughly be the damage on a OC 920, P6T, 6GB, 3SATA, GTX275??

I tried a few online things and have had everything from 400w to 1050w(!) come up. Was planning on a 850 to keep things cool but the 750 does look tempting.

Thanks if you can.
Id say 500w load, maybe a bit lower. So 750 shud deffo do the trick.

1050w is just tekkin teh pish

09-09-2009, 07:11:42

VonBlade
Lol. Well the 1050 was on a manu's site, so obviously they have a vested interest in making you buy the flagship one

Thanks a lot peeps.

11-09-2009, 18:50:38

Hope
All up and running now, very happy with it

18-09-2009, 16:40:57

Diablo
I bought one of these for my Dad's new rig. I'm now absolutely green with envy...its so easy to work with, even with the lian li half outside power supply case (A06B I think)...power is stable and everything is cool and quiet...yum

03-10-2009, 11:36:33

mayhem
bought one. as my new power supply haven't fitted it yet but by heck she's a heavy little bugger lol. Love the flat cabling ...

Hopefully now my PC wont scream at me like a little baby crying in the middle of the night wanting to be Brest fed by its mother when trying to play on duel cards.

heres hoping any way..

04-10-2009, 15:51:01

Mr. Smith
Nice psu. Looking for a modular one for my upcoming build, might get the 850 as its only a few quid more...

04-10-2009, 17:09:45

I Hunta x
when i need an upgrade to my 600w ocz for a multi gpu setup or what ever im deff getting the 750w version if not one of the higher ones as i probably wouldnt need more tbh but nice to have the options from a beasty psu
Reply
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