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From: Daniel Prince on 20 Nov 2009 00:44
I have read that electrolytic capacitors are the least reliable
component in power supplies. I have also read that there are
motherboards with solid polymer capacitors. Are there any power
supplies with solid polymer capacitors? Thank you in advance for
all replies.
--
Whenever I hear or think of the song "Great green gobs of greasy
grimey gopher guts" I imagine my cat saying; "That sounds REALLY,
REALLY good. I'll have some of that!"
From: Pen on 20 Nov 2009 03:13
Daniel Prince wrote:
> I have read that electrolytic capacitors are the least reliable
> component in power supplies. I have also read that there are
> motherboards with solid polymer capacitors. Are there any power
> supplies with solid polymer capacitors? Thank you in advance for
> all replies.
> --
> Whenever I hear or think of the song "Great green gobs of greasy
> grimey gopher guts" I imagine my cat saying; "That sounds REALLY,
> REALLY good. I'll have some of that!"
I've found pc coo;ing to be the most reliable supplier. Not always the
cheapest, but highly reliable.
http://www.pcpower.com/index.html
From: larry moe 'n curly on 20 Nov 2009 04:42


Daniel Prince wrote:
>
> I have read that electrolytic capacitors are the least reliable
> component in power supplies. I have also read that there are
> motherboards with solid polymer capacitors. Are there any power
> supplies with solid polymer capacitors?

Try the usual places where experts test and disect PSUs (they actually
remove all the power transistors and diodes), like:

www.JonnyGuru.com
www.HardwareSecrets.com
www.HardOCP.com
www.XbitLabs.com

I don' t know if any PC PSUs use polymer/organic/os-con caps
exclusively on the low voltage side (the only place they will be
found, as polymers aren't made for more than about 30-50 volts).
Polymers seem to be found mostly in PSUs with really high power
ratings, but Seasonic makes a 650W with some in it.

More important than having polymers is not having junk brand caps
because junk can fail in just 1-2 years, while good conventional
electrolytics can last a decade, as demonstrated by my vintage 1999
Delta PSUs (only Japanese caps -- none bulging, and the few I sampled
measured in specs for capacitance and ESR last year) and my 33-year-
old TV (only 2 of its Sanyo caps failed, and I love the fake wood
grain).

From: William Sommerwerck on 20 Nov 2009 08:42
If I interpret your question correctly, it's meaningless.

Polymer capacitors (ie, plastic-dielectric caps, such as polystryrene,
Mylar, and Teflon) simply cannot produce the huge capacitances in small
spaces that electrolytics can. They cannot easily replace electrolytics.


From: JW on 20 Nov 2009 09:18
On Fri, 20 Nov 2009 05:42:16 -0800 "William Sommerwerck"
<grizzledgeezer(a)comcast.net> wrote in Message id:
<he66ds$4o1$1(a)news.eternal-september.org>:

>If I interpret your question correctly, it's meaningless.
>
>Polymer capacitors (ie, plastic-dielectric caps, such as polystryrene,
>Mylar, and Teflon) simply cannot produce the huge capacitances in small
>spaces that electrolytics can. They cannot easily replace electrolytics.
>

I think the OP is referring to claims such as these:
http://event.asus.com/mb/5000hrs_VRM/

*cough*
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