Corsair HX750w (750w) ATX PSU

Appearance & Internals

Published: 27th August 2009 | Source: Corsair | Price: £113 | Author: James Napier

Appearance & Internals

Starting off with the externals of the HX750w, everything looks pretty much identical to the HX850w barring the model number on the stickers. Both units have exactly the same dimensions, the same matte black powdercoat finish and the same modular connector backplane layout.

However one easily overlooked difference between the two is the number of hard-wired connectors on the unit. Whereas the HX850w has 2x PCI-E connectors along with the usual ATX and EPS12v connectors, the HX750w is void of any hard-wired PCI-E connectors.This brings the total number of hard-wired connectors down to 4 for the HX750w which is probably about right given the rated power output of the unit.

One positive way to look at the removal of these hard-wired connectors is in the name of vanity. If like me, you'd much rather see Corsair's sexy flat style modular connectors routing around your PC rather than the sleeved versions, then the HX750w would be the natural choice as you can run two high-end GPU's from the four modular PCI-E cables without needing to hide away the remaining two hard-wired cables.

Moving on to the internals, everything at first glance appears to be identical to that of the HX850w. Three rather thin heatsinks run in parallel along the length of the unit and all cables going to the modular backplane and other areas of the PSU are extremely tidy. Two DC-DC daughter boards with solid-state capacitors can be seen over on the low voltage side of the unit which, as mentioned in our previous HX850w review, are responsible for the stepping down of the PSU's primary +12v output down to +3.3v and +5v for the other rails.

Going in for a closer look, we can see that two Nippon Chemicon 420v / 330uF / 105°C capacitors and two custom-wound Viking Controls transformers have been used over on the primary (high-voltage) side along with a collection of Nippon Chemicon 16v / 2200uF / 105°C KZE capacitors over on the secondary side. This is exactly the same configuration as that of the HX850w, leaving us none the wiser as to what the physical differences between the two models are.

In a last ditch effort to try and spot any minor changes between the HX750w and HX850w units a negative image of the HX850w was placed under a 50% transparent image of the HX750w. Any differences between the two units show up in bright blue, orange or white shades. Once again there is very little to separate the two units with the only noticeable discrepancy being in the size of the inductor on the secondary side, which shouldn't really have any effect on the output power of the unit.

So with virtually no visible differences between the two PSU's other than a couple of missing PCI-E connectors, let's see if any differences present themselves during the testing over on the next page...

Most Recent Comments

27-08-2009, 15:40:15

Jim

"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

Jim

Quote:

Originally Posted by name='Kylevdm'

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

Jim

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

Jim

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

Jim

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'

Surely the 750 would be enough, even a 600w would I reckon...

09-09-2009, 06:18:23

Jim

Quote:

Originally Posted by name='VonBlade'

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

Corsair HX750w (750w) ATX PSU

Appearance & Internals

Published: 27th August 2009 | Source: Corsair | Price: £113 | Author: James Napier

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