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Old 02-17-09, 11:01 AM   #1
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Default Suggestion for 100W silent PSU

Hi all,

I'm building a small Atom-based NAS for home, therefore, I need a small (100W or so), silent (and by silent I mean really silent), 80%+ PSU.

Any suggestion ?
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Old 02-17-09, 11:27 AM   #2
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Default Re: Suggestion for 100W silent PSU

maybe something on this page?

http://www.newegg.com/Product/Produc...e=&srchInDesc=
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Old 02-17-09, 01:04 PM   #3
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Default Re: Suggestion for 100W silent PSU

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Originally Posted by ViN86 View Post
Too powerful (except maybe one at 145W), unknown brands, most with 80mm fans (a big no-no for silence). No way.

By the way, when I said small, I didn't mean in size, a standard ATX one would be good, as long as it's efficient and whisper silent.
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Old 02-17-09, 01:20 PM   #4
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Default Re: Suggestion for 100W silent PSU

I cant help much, but I know there is a Zalman PSU that is cooled only by heatpipes. Might be to many watts for you though
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Old 02-21-09, 02:46 AM   #5
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Default Re: Suggestion for 100W silent PSU

Why do you need 100W? Just get a good one that fits your needs. It'll only use as much as the system requires. In fact, a small load on a more powerful unit will make less heat and probably use less power than maxing out the weakest unit you can find.

Try this:
http://www.newegg.com/Product/Produc...82E16817104044
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Old 02-21-09, 05:41 AM   #6
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Default Re: Suggestion for 100W silent PSU

Quote:
Originally Posted by CaptNKILL View Post
Why do you need 100W? Just get a good one that fits your needs. It'll only use as much as the system requires. In fact, a small load on a more powerful unit will make less heat and probably use less power than maxing out the weakest unit you can find.
Not completely true. If you look at the efficiency curves for any psu, you'll see that it starts low, rises up to to a maximum (usually around 70-80% of the maximum power), and then decreases again.

So, given that the system will draw around 50-80W, it makes sense to get a 100-120W PSU, so as to make it work in the range of near maximum efficiency. Putting a 300W in that system would make no sense at all.
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Old 02-21-09, 09:00 AM   #7
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Default Re: Suggestion for 100W silent PSU

picoPSU-120 DC/DC 12-25v Red (120 Watt) ?

Would that work?
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Old 02-21-09, 09:47 AM   #8
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Default Re: Suggestion for 100W silent PSU

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Originally Posted by XDanger View Post
picoPSU-120 DC/DC 12-25v Red (120 Watt) ?

Would that work?
With the 120W brick, possibly. Two problems: 1) Going by silentpcreview review, the fan in the brick is loud, though it only kicks in at 90W+, and I guesstimate the system to only draw some 60W or so, so it shouldn't be a problem (and I could go with the 80W brick), and 2) I'm not sure I can find it here in .it (yeah, it's a ****ty country, I should move as soon as possible)...

I think I will look into it...
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Old 02-21-09, 11:52 AM   #9
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Default Re: Suggestion for 100W silent PSU

http://shop.ebay.it/items/picoPSU-12...120QQ_fromZR40
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Old 02-21-09, 02:07 PM   #10
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Default Re: Suggestion for 100W silent PSU

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Originally Posted by lightman View Post
Not completely true. If you look at the efficiency curves for any psu, you'll see that it starts low, rises up to to a maximum (usually around 70-80% of the maximum power), and then decreases again.

So, given that the system will draw around 50-80W, it makes sense to get a 100-120W PSU, so as to make it work in the range of near maximum efficiency. Putting a 300W in that system would make no sense at all.
Hmm... I didn't know that.

Anyways, check out some of the stuff at these sites:

http://www.logicsupply.com/
http://www.mini-box.com/site/index.html

I've used logicsupply before and they have good service.
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Old 03-15-09, 02:18 PM   #11
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Default Solved ;)

Ok, I finally found something that fits my needs, I will go with an Apex MD-100 case, which includes a DC/DC converter (like the PicoPSU) and an external brick: http://www.apextechusa.com/products.asp?pID=158 (yes, the external brick is only 60W, but the internal DC/DC converted is rated at 80W, so, if needed, I will just get a new, 80W external brick)

I will fill it with an Intel Little Falls 2 board (Atom 330), 2GB of ram, two WD Caviar Green 1TB drives, and a 4GB usb pendrive for the OS (Linux).

The two Caviar will be RAID-1 in software, and the whole box will be my new NAS box

I will post a build-it-yourself NAS review/tutorial as soon as I get ahold of all the parts
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