| Author |
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Skeleton Man
Guest
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 Posted:
Sun Dec 19, 2004 10:19 am Post subject:
power fluctations |
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Hi all,
Just wondering what's so different in technology, that when there's a power
fluction for a couple of seconds, my P4 system w/ 350W psu is unaffected,
yet my P200Mhz with a 150W AT supply resets ?
I realise we're talking vast differences in operation and a good 10 years
apart, but what's the major factor ? Larger caps or more than that ?
Regards,
Chris |
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kony
Guest
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| Posted:
Sun Dec 19, 2004 11:33 am Post subject:
Re: power fluctations |
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On Sun, 19 Dec 2004 05:19:00 GMT, "Skeleton Man"
<invalid@guestwho.com> wrote:
| Quote: | Hi all,
Just wondering what's so different in technology, that when there's a power
fluction for a couple of seconds, my P4 system w/ 350W psu is unaffected,
yet my P200Mhz with a 150W AT supply resets ?
I realise we're talking vast differences in operation and a good 10 years
apart, but what's the major factor ? Larger caps or more than that ?
Regards,
Chris
|
Most likely larger caps and more of a shift in amperage to
the 12V rail for the P4 CPU, resulting in a higher
proportional capacitance per amperage on 5V rail. Even so,
2 seconds is a fairly long time for a box to stay up without
AC input, if the problem is frequent you might consider
using an UPS. |
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Zotin Khuma
Guest
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| Posted:
Sun Dec 19, 2004 1:00 pm Post subject:
Re: power fluctations |
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"Skeleton Man" <invalid@guestwho.com> wrote in message
news:8b8xd.78502$K7.8900@news-server.bigpond.net.au...
| Quote: | Hi all,
Just wondering what's so different in technology, that when there's a
power
fluction for a couple of seconds, my P4 system w/ 350W psu is unaffected,
yet my P200Mhz with a 150W AT supply resets ?
I realise we're talking vast differences in operation and a good 10 years
apart, but what's the major factor ? Larger caps or more than that ?
Regards,
Chris
I've known several cases where, out of two or more computers with |
closely similar specs, one is more tolerant of power fluctuations than
another. So it's not a generation gap thing.
I get a chance to observe such things when I build 4/5 computers
at the same time, the main difference between them being the cases,
chosen to suit a client's taste and requirements, which come with
their own PSUs.
Living in a remote area where most buyers are very price-conscious,
it's more convenient to use the built-in PSUs and tweak them if
necessary, rather than use separate big-name PSUs. But I've
never directed such tweaking towards tolerance of power
fluctuations. I'll keep it in mind and perhaps report the results in
this NG. |
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Rene
Guest
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| Posted:
Sun Dec 19, 2004 7:54 pm Post subject:
Re: power fluctations |
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"Skeleton Man" <invalid@guestwho.com> schreef in bericht
news:8b8xd.78502$K7.8900@news-server.bigpond.net.au...
| Quote: | Hi all,
Just wondering what's so different in technology, that when there's a
power
fluction for a couple of seconds, my P4 system w/ 350W psu is unaffected,
yet my P200Mhz with a 150W AT supply resets ?
|
My 386 already had a 250 W AT supply, so perhaps Your 150 W is a not quite
enough for Your P200...
Furthermore there may be a difference in quality like someone else already
suggested.
Rene |
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ric
Guest
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| Posted:
Mon Dec 20, 2004 1:26 am Post subject:
Re: power fluctations |
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Skeleton Man wrote:
| Quote: | Just wondering what's so different in technology, that when there's a power
fluction for a couple of seconds, my P4 system w/ 350W psu is unaffected,
yet my P200Mhz with a 150W AT supply resets ?
I realise we're talking vast differences in operation and a good 10 years
apart, but what's the major factor ? Larger caps or more than that ?
|
Likely, two reasons:
1) The 350W PSU likely has a longer holdover storage specification
at full rated load.
2) The 150W PSU is likely operating at closer to full rated load,
making it have an even shorter holdover storage. |
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Skeleton Man
Guest
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| Posted:
Mon Dec 20, 2004 6:53 am Post subject:
Re: power fluctations |
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| Quote: | Just wondering what's so different in technology, that when there's a power
fluction for a couple of seconds, my P4 system w/ 350W psu is unaffected,
yet my P200Mhz with a 150W AT supply resets ?
|
Just to add more a little more info:
The P200 box is a server, just a mainboard and a 4GB hdd.. largely just a
gateway so 99% of the time the cpu is idle..
The power flucations aren't too common except during windy days.. it's not
worth investing in a UPS as it'd be worth about 4 or 5 times what the
machine is.. I'll try a larger psu if I can find one and see what happens..
Regards,
Chris |
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Norm
Guest
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| Posted:
Wed Dec 22, 2004 11:53 am Post subject:
Re: power fluctations |
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"Skeleton Man" <invalid@guestwho.com> wrote in message
news:Agqxd.79956$K7.28681@news-server.bigpond.net.au...
| Quote: | Just wondering what's so different in technology, that when there's a
power
fluction for a couple of seconds, my P4 system w/ 350W psu is unaffected,
yet my P200Mhz with a 150W AT supply resets ?
Just to add more a little more info:
The P200 box is a server, just a mainboard and a 4GB hdd.. largely just a
gateway so 99% of the time the cpu is idle..
The power flucations aren't too common except during windy days.. it's not
worth investing in a UPS as it'd be worth about 4 or 5 times what the
machine is.. I'll try a larger psu if I can find one and see what
happens..
|
200 watt power supplies were the standard as far back as the XT. Is your
p200 a compact case or something like that? Really odd to hear about a 150
watt power supply. |
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Skeleton Man
Guest
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| Posted:
Thu Dec 23, 2004 10:36 am Post subject:
Re: power fluctations |
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| Quote: | 200 watt power supplies were the standard as far back as the XT. Is your
p200 a compact case or something like that? Really odd to hear about a 150
watt power supply.
|
Standard AT.. the PSU is just one I salvaged from a 2nd hand shop..
Regards,
Chris |
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