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Old 05-29-2014
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Oklahoma Wolf Oklahoma Wolf is offline
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Default Does a bigger PSU mean a quieter PSU?

http://www.corsair.com/en-us/blog/20...axi_fan-speeds

Discuss!
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Old 05-29-2014
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no and yes its depend on the PSU (basis)

look here :

http://www.hartware.de/review_1560_8.html
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Old 05-29-2014
Stefan Payne Stefan Payne is offline
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Quote:
If your goal is a quieter PC, and the budget allows, it may make sense to get a larger than necessary power supply.
Well, no look here, scroll a little down, look at the Picture with the table.

550W @ 100%: ~550rpm
1200W @ 10%: ~620rpm

So there's no way the 1200W can be quieter than the 550W P10...

The point is:
With a smaller wattage one could (theoretically) use a fan with less max. rpm than a higher wattage unit. A 480W E9 has AFAIR a 1200rpm fan in it, the 700W has a 1800rpm fan...

So no, bigger PSUs are not usually quieter, unless someone did something wrong...
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Old 05-29-2014
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Quote:
Originally Posted by tinpoint View Post
no and yes its depend on the PSU (basis)

look here :

http://www.hartware.de/review_1560_8.html
Yes.... depending on the PSU. Since the article is on Corsair's website, you should know they're talking about Corsair PSUs.

That *should* go without saying, but people's lack of reading comprehension never ceases to amaze me.

A future article will cover the RM Series (something more consistent, build wise, going from platform to platform and more mainstream.

I was compelled to write this after certain forum members kept spouting off that all fan controllers are the same regardless of wattage and that you should just get as small as PSU as possible.
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Old 05-29-2014
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Quote:
Originally Posted by Stefan Payne View Post
Well, no look here, scroll a little down, look at the Picture with the table.

550W @ 100%: ~550rpm
1200W @ 10%: ~620rpm

So there's no way the 1200W can be quieter than the 550W P10...
So you read the title of the forum thread, and only the conclusion paragraph of the article that's linked?

Classic.

The sentence does say "may", which implies "not in all cases", but since that might get lost in translation, I've added more to that paragraph since your response.

It's an article on Corsair's website and it pertains to Corsair's PSUs. Like I said to tinpoint: It's based on the AXi, but an RM Series version will be live in a week or so.

If beQuiet chooses to use the same fan controller in every PSU..... that's their problem.
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Old 05-29-2014
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This says it all:
Quote:
And the AX760i and AX1200i are quite different from each other.
Two totally different power supply's. The 1200W has bigger heatsinks because at full load it has to dissipate more heat then the 760W.

If you look at the AX860i and AX760i you see that at the same wattages, the fan has about the same RPM.
http://www.techpowerup.com/reviews/C.../AX760i/5.html
http://www.techpowerup.com/reviews/C.../AX760i/5.html

So as Tinpoint says, it all depends on the PSU.
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Old 05-29-2014
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And the article says it depends on the PSU too, and goes more in depth than "bigger heatsinks".

I can't help but feel that you're only reading the last paragraph.

What spawned this article was not "all bigger PSUs are quieter" or "all PSU controllers are the same or different". But many people are willing to buy a larger PSU if it's in the budget, yet are told that it's overkill (which is often true) AND that the larger PSU would in no way be any quieter, which is a blanket statement in itself. Corsair's not the only one programming fan controllers on a case by case basis, but it's naive to assume that all fan controllers MUST operate on the same curve. That ranks up there with "that fan's maximum RPM is 2300 RPM, therefore that fan must spin at 2300 RPM when the PSU is at its hottest." It's just a lot of misinformed horse shit.

The RM version of this experiment will be more apples to apples.
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Last edited by jonnyGURU; 05-29-2014 at 07:14 PM.
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Old 05-29-2014
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Quote:
Originally Posted by Stefan Payne View Post
Well, no look here, scroll a little down, look at the Picture with the table.

550W @ 100%: ~550rpm
1200W @ 10%: ~620rpm

So there's no way the 1200W can be quieter than the 550W P10...

The point is:
With a smaller wattage one could (theoretically) use a fan with less max. rpm than a higher wattage unit. A 480W E9 has AFAIR a 1200rpm fan in it, the 700W has a 1800rpm fan...

So no, bigger PSUs are not usually quieter, unless someone did something wrong...
So what your saying is bequiet! can't do it. Good to know we should avoid bequiet!
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Old 05-29-2014
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yeah, so many variables...you always look silly making categorical statements without any caveats.

Nice to see simple test results that are easy to understand.

Of course, you can always ignore the tests and repeat your preconceived bias.
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Old 05-29-2014
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Isn't the answer just maybe. All depends on each psu family and controller. There's no black and white here and probably never will be.
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