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PSU Corsair 750AX Gold VS 750HX !! HELP.

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  • New Build
  • Corsair
  • Systems
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July 29, 2012 2:51:15 PM

Pros and Cons: Corsair 750AX vs 750HX.

Please be clear of the differences and tell me which should I buy for my new rig.

Here's the build, thank you:

1) GPU: Asus Nvidia Geforce 670GTX DC2T

2) CPU: Intel Core i5-3570K Box

3) Motherboard: Asus Sabertooth Z77

4) Case: Corsair CC600TWM-WHT Graphite Special Edition

5) PSU: Corsair CMPSU-750AXEU Gold AX750 Modular

6) RAM: 2X8GB G.Skill Ripjaw-X DDR3 1600Mhz

7) CPU cooler: Noctua NH-D14

8)SSD: Crucial Solid Series 256GB CT256M4SSD2 SSD

9)DVD driver: some Samsung DVD drive I guess..

More about : psu corsair 750ax gold 750hx

July 29, 2012 2:58:12 PM

Think about it from this perspective. AX is a Golden efficiency certified, and HX is just a standard certified. The fan in HX has to work harder to clear more heat for the same amount of the supplied electricity. Thus, your choice is clear -- it's AX.

CORSAIR SUPPORT ^
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July 29, 2012 3:04:47 PM

will it be sufficient for SLI my GPU too?
double or triple SLI btw?
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July 29, 2012 3:06:31 PM

Yes but i would personally go to 850.
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July 29, 2012 3:09:08 PM

why?
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July 29, 2012 3:10:48 PM

Just my opinion thats all the 750 is fine.
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July 29, 2012 3:16:48 PM

Ransome said:
will it be sufficient for SLI my GPU too?
double or triple SLI btw?

It should be fine running 3-way GTX 670 SLI, but you would be pushing the PSU harder if you intended to overclock the PC.
A side note; a 3rd card in SLI doesn't add much value.
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July 29, 2012 3:18:41 PM

Also This power supply is shorter then the HX 750 and at low loads, the fan does not even run on this power supply(so very quiet idles). Last off it is fully modular if you are into that kind of thing.

I would buy it just for the quieter/better fan and gold rating(and size, since my FT03 case is small). To be honest, i have never even left warm air come from my HX 850.
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July 29, 2012 3:20:59 PM

Not gonna go 3 way anyways. And I don't think I need to go more than a single GPU with my rig.

I think of buying the AX GOLD 850 to be safe for at least double SLI.
What do you think?
And on this wave, should I go with the i5 3750K or the i7 3770k?
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July 29, 2012 3:27:49 PM

3770k if you intend to use multi threaded applications like CS6, Maya, 3D Max and so on...

For just gaming, the 3750k is the sweet spot, but be noted that Ivy bridge gets hotter when OCed, you might wanna consider a good aftermarket cooler.
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July 29, 2012 3:29:12 PM

Noctua NH-d14
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July 29, 2012 3:29:42 PM

Ransome said:
I think of buying the AX GOLD 850 to be safe for at least double SLI.
What do you think?

850W for 2-way SLI?
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July 29, 2012 3:30:40 PM

Area51reopened is wrong about some of the differences between these two PSUs...

They are both 80 Plus Gold certified, check for yourself: http://www.plugloadsolutions.com/80PlusPowerSuppliesDet...
As you can see both CMPSU-750HX and CMPSU-750AX are Gold certified.
Corsair have decided to market the HX series as 80 Plus Silver because not all samples of HX units can meet the 80 Plus Gold certification at 50C (which is not actually a requirement of 80 Plus).

Other differences between them include:
The AX series is fully modular. The HX series has the 20+4pin and the 4+4pin cables hardwired, all other cables are modular.
The AX series (up to 850W) uses a smaller case; 160mm deep vs 180mm deep. This doesn't really matter in the case you have chosen.
The AX series (up to 850W) is a rebadged Seasonic X series, while the HX is a CWT DSG design. The AX uses a newer design.
The AX series (up to 850W) is semi-fanless, the fan starts up at about 25% load. The fan on the HX series is always on.
The AX 750 uses a Sanyo Denki San Ace 120 9S1212F404. When it is spinning it idles at ~350RPM and at full load goes up to about 1600RPM.
The 750HX uses a Yate Loon D14BH-12 or a Hong Hua HA1425H12B-Z. The fan on the 850W model has been measured idling at 900/1000RPM but on load only goes up to 1300/1400RPM. Although it probably will go higher if they are really pushed.

Agree that a 750W is already more than enough for a GTX 670 SLI build.
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July 29, 2012 3:31:57 PM

What do you imply?
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July 29, 2012 3:39:06 PM

I´d get the CORSAIR Professional Series HX850 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

As Corsair HX series are modular PSUs, then I´d also change the case for better cable management. Get yourself a COOLER MASTER HAF 932 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

As for i5 3750K or the i7 3770k, it depend on your usage. If it is for gaming, then get the i5, now if need it for a workstation, video editing and rendering, then get the i7.


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July 29, 2012 4:41:58 PM

Ransome said:
What do you imply?

Both units are great, it may matter to you the info provided by Silvune, for me there's no critical difference between the 2 units. Any of them is just great.
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