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Archived from groups: alt.comp.hardware.homebuilt (More info?)
Wes Newell <w.newell@TAKEOUTverizon.net> wrote in message news:<pan.2004.06.10.19.28.06.691636@TAKEOUTverizon.net>...
> On Thu, 10 Jun 2004 05:36:17 -0700, larrymoencurly wrote:
> > Considering that many cheap 500W+ PSUs look less substantial
> > than many of the better 300W PSUs, I find it hard to believe
> > that a 550W selling for $15 can be trusted when lots of power
> > is needed, unless it was a surplus special.
>
> So now you want me to to provide data for all cheap power
> supplies. I wouldn't hold my breath.
>
> Now, since you say many cheap 500W PSU's are less substantial
> than many of the better 300W's, why don't you prvide the data
> to prove this. Rediculous as that sounds, it's exactly what
> was asked of me. So for get it.
Compare this: www.bit-tech.net/images/review/123/7.jpg
to this: http://terasan.okiraku-pc.net/dengen/no20/open.jpg
http://terasan.okiraku-pc.net/dengen/no20/up02.jpg
(lots of PSU internals pictured at
http://terasan.okiraku-pc.net/dengen/ )
If you didn't know anything else about either PSU, which one would you
think had the higher power rating? The first PSU is a 550W Q-tec
while the second is a 300W Powerman (Fortron-Source, also makes
Sparkle), and unless the Q-tec's transformer has higher capacity for
the same dimensions or is run at a higher frequency, how can it put
out more power than the Powerman's? Similarly, unless the Q-tec is
more efficient (fat chance), won't its heatsinks likely run hotter at
any given power level than the Powerman's? But most of all, why do
companies like PC Power & Cooling, Antec, and Fortron-Source use
bigger capacitors, heatsinks, and transformers if they're unnecessary,
especially when most customers don't care about the insides?
Except for an Enermax, all the PSU failures I've experienced have been
with cheapos. One didn't have good overload protection for the +3.3V
(almost identical to the one shown by PC Power & Cooling as an example
of a bad PSU), a low voltage capacitor in a Powmax failed (could have
been one of those made with faulty electrolyte), and a Deer shorted
several 16V capacitors, probably because it sent 50V spikes into them.
And that failed Enermax was badly made 250W without an anti-surge
thermistor.
Wes Newell <w.newell@TAKEOUTverizon.net> wrote in message news:<pan.2004.06.10.19.28.06.691636@TAKEOUTverizon.net>...
> On Thu, 10 Jun 2004 05:36:17 -0700, larrymoencurly wrote:
> > Considering that many cheap 500W+ PSUs look less substantial
> > than many of the better 300W PSUs, I find it hard to believe
> > that a 550W selling for $15 can be trusted when lots of power
> > is needed, unless it was a surplus special.
>
> So now you want me to to provide data for all cheap power
> supplies. I wouldn't hold my breath.
>
> Now, since you say many cheap 500W PSU's are less substantial
> than many of the better 300W's, why don't you prvide the data
> to prove this. Rediculous as that sounds, it's exactly what
> was asked of me. So for get it.
Compare this: www.bit-tech.net/images/review/123/7.jpg
to this: http://terasan.okiraku-pc.net/dengen/no20/open.jpg
http://terasan.okiraku-pc.net/dengen/no20/up02.jpg
(lots of PSU internals pictured at
http://terasan.okiraku-pc.net/dengen/ )
If you didn't know anything else about either PSU, which one would you
think had the higher power rating? The first PSU is a 550W Q-tec
while the second is a 300W Powerman (Fortron-Source, also makes
Sparkle), and unless the Q-tec's transformer has higher capacity for
the same dimensions or is run at a higher frequency, how can it put
out more power than the Powerman's? Similarly, unless the Q-tec is
more efficient (fat chance), won't its heatsinks likely run hotter at
any given power level than the Powerman's? But most of all, why do
companies like PC Power & Cooling, Antec, and Fortron-Source use
bigger capacitors, heatsinks, and transformers if they're unnecessary,
especially when most customers don't care about the insides?
Except for an Enermax, all the PSU failures I've experienced have been
with cheapos. One didn't have good overload protection for the +3.3V
(almost identical to the one shown by PC Power & Cooling as an example
of a bad PSU), a low voltage capacitor in a Powmax failed (could have
been one of those made with faulty electrolyte), and a Deer shorted
several 16V capacitors, probably because it sent 50V spikes into them.
And that failed Enermax was badly made 250W without an anti-surge
thermistor.