Corsair AX750 80 Plus Gold: Putting Corsair's Best to the Test
by Martin Kaffei on November 30, 2010 12:00 AM EST- Posted in
- Cases/Cooling/PSUs
- Corsair
- PSUs
- 80Plus Gold
- 750W
Noise Levels
Ah! Even though Corsair doesn't use a PWM-controlled fan, they do have a nice Sanyo Denki fan. The 9S1212F404 has ball-bearings and 7 well-processed fan blades.
Sound Pressure Level | |
Load | dB(A) |
10% | 0 |
20% | 0 |
50% | 18 |
80% | 25 |
100% | 31 |
110% | 33 |
There is no noise at low load (or idle), and it's only when we approach 50% load that the fan begins to spin. With a 750W rating, that means you need to draw at least 375W before you get any noise from the PSU, and even a draw of 600W (80%) results in just 25dB(A)--hardly anything to worry about. Overall the cooling concept is nearly the same as the Seasonic X-series. Of course, it could be quieter at 110% overload, but you normally don't reach this level (or want to!); it's just nice to see that there is an output reserve available.
Just what sort of components would even require 600W of power? Short of running 10+ HDDs, an overclocked i7-920 (essentially i7-965 at 3.33GHz) and two GTX 580 GPUs in SLI with a single SSD maxed out at a punishing 777W... but that's wall power. Even at 90% efficiency you'd still only pull 700W from the PSU, and that's with our worst-case Furmark load. In other words, short of tri-SLI, insane overclocking, and/or tons of HDDs the AX750 should be able to handle anything you throw at it.
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Qbah - Friday, December 3, 2010 - link
And this thing is amazing. The silence is simply incredible! Best PSU there is IMO.akashagarawal3d - Monday, December 20, 2010 - link
hi! all of u: i want to know that will it support my system:amd phenom 2 x4 965 be @4ghz
6gb ddr3-1600 mhz kingston ram oc
msi -890fxa-gd70
benq g2420hd
xfx hd 6970 2gb gddr5 950/1400
will it support my sys.
DarkUltra - Sunday, January 23, 2011 - link
Hi!I have horrible squealing when I have high FPS in games (game menus especially) or other type of GPU load. I believe it is a combination of my PSU and graphics card. I've tried two cards and two psus. GeForce gtx 285 and gtx 470 both squeal much more with a Mist 650W rev 4.0 than the Mist 650W rev 3.5. The only difference is that the rev 4.0 have one 50A 12V rail while the quieter rev 3.5 have four 20A 12V rails.
http://www.bit-tech.net/news/hardware/2009/05/29/m...
The mists are known to be squealy I heard, but how about the Corsair AX750 80 Plus Gold? Can you try it with a few recent 3d cards? I'm looking for a quiet psu/gpu combo.
Nzeman - Wednesday, March 16, 2011 - link
Thanks for the review, great as always. I will be getting this PSU in my new build for sure.