Power supply at the bottom of the computer chassis?
Would it suck a lot of dust like a vacuum cleaner? :)
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Re: Power supply at the bottom of the computer chassis?
Man-wai Chang to The Door (33600bps) wrote:
> Would it suck a lot of dust like a vacuum cleaner? :)
Do you just get bored easy or something, what with this constant stream of
crap questions?
No, a PSU in the bottom of the case doesn't vacuum up anything, unless the
case designer was stupid enough to put holes in the case directly under the
PSU fan, which certainly isn't the case in my Antec P180.
Re: Power supply at the bottom of the computer chassis?
> No, a PSU in the bottom of the case doesn't vacuum up anything, unless the
> case designer was stupid enough to put holes in the case directly under the
> PSU fan, which certainly isn't the case in my Antec P180.
You talking about a dust filter? I was talking about a regular hole!
The old design (power supply at the top) should be more tolerant to dust.
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Re: Power supply at the bottom of the computer chassis?
On 3/14/2010 5:29 AM, Man-wai Chang to The Door (33600bps) wrote:
>
> Would it suck a lot of dust like a vacuum cleaner? :)
>
Most power supplies suck air in through the bottom (or top) of the unit
and exhaust it out the back as their cooling strategy. If the air is
dusty it will suck in the dust also. Most time the air comes from inside
the case, so the air comes through the case intakes. Most cases have a
screen on the intakes. Short answer: it probably doesn't matter where in
the case it is, but if you keep your case on the floor and never clean
your screens or blow out the case then it might see a greater than
average flow of dust.
Re: Power supply at the bottom of the computer chassis?
On 3/14/2010 5:56 AM, SteveH wrote:
> Man-wai Chang to The Door (33600bps) wrote:
>> Would it suck a lot of dust like a vacuum cleaner? :)
>
> Do you just get bored easy or something, what with this constant stream of
> crap questions?
>
> No, a PSU in the bottom of the case doesn't vacuum up anything, unless the
> case designer was stupid enough to put holes in the case directly under the
> PSU fan, which certainly isn't the case in my Antec P180.
>
> And shorten yer oversized sig line.
>
Is this a newsgroup or a tree fort?
Re: Power supply at the bottom of the computer chassis?
TVeblen wrote:
> On 3/14/2010 5:56 AM, SteveH wrote:
>> Man-wai Chang to The Door (33600bps) wrote:
>>> Would it suck a lot of dust like a vacuum cleaner? :)
>>
>> Do you just get bored easy or something, what with this constant
>> stream of crap questions?
>>
>> No, a PSU in the bottom of the case doesn't vacuum up anything,
>> unless the case designer was stupid enough to put holes in the case
>> directly under the PSU fan, which certainly isn't the case in my
>> Antec P180. And shorten yer oversized sig line.
>>
> Is this a newsgroup or a tree fort?
Re: Power supply at the bottom of the computer chassis?
Man-wai Chang to The Door (33600bps) wrote:
>> No, a PSU in the bottom of the case doesn't vacuum up anything,
>> unless the case designer was stupid enough to put holes in the case
>> directly under the PSU fan, which certainly isn't the case in my
>> Antec P180.
>
> You talking about a dust filter? I was talking about a regular hole!
> The old design (power supply at the top) should be more tolerant to
> dust.
I'm talking about no hole at all. The PSU in my P180 gets its air from the
front of the case, the same as if it was at the top, except its /nearer/ to
the source of incoming cool air, which should be better for it.
Re: Power supply at the bottom of the computer chassis?
On 3/14/2010 5:56 AM, SteveH wrote:
> Man-wai Chang to The Door (33600bps) wrote:
>> Would it suck a lot of dust like a vacuum cleaner? :)
>
> Do you just get bored easy or something, what with this constant stream of
> crap questions?
>
> No, a PSU in the bottom of the case doesn't vacuum up anything, unless the
> case designer was stupid enough to put holes in the case directly under the
> PSU fan, which certainly isn't the case in my Antec P180.
>
> And shorten yer oversized sig line.
>
What he said, and...
If you keep your computer elevated (on your desk, for example) instead
of on or near the floor, it might be better, generally.
I say might, because that is not the answer for everybody. For example
if keeping the computer cool is a top priority the 'puter might stay
cooler if it stays near the floor - as long as it's not by a heating
vent or radiator.
I have pets, and they shed a lot, and so I don't just have dust to deal
with but pet hair and dander to be aware of as well. I keep my computer
on my desk, and that seems to keep it fairly dust-free.
Re: Power supply at the bottom of the computer chassis?
On 3/14/2010 8:03 AM, Man-wai Chang to The Door (33600bps) wrote:
>> No, a PSU in the bottom of the case doesn't vacuum up anything, unless
>> the
>> case designer was stupid enough to put holes in the case directly
>> under the
>> PSU fan, which certainly isn't the case in my Antec P180.
>
> You talking about a dust filter? I was talking about a regular hole!
> The old design (power supply at the top) should be more tolerant to dust.
Just keep your local area free of dust. If you don't like
housecleaning, hire somebody.
Re: Power supply at the bottom of the computer chassis?
On 3/14/2010 8:19 AM, TVeblen wrote:
> On 3/14/2010 5:29 AM, Man-wai Chang to The Door (33600bps) wrote:
>>
>> Would it suck a lot of dust like a vacuum cleaner? :)
>>
> Most power supplies suck air in through the bottom (or top) of the unit
> and exhaust it out the back as their cooling strategy. If the air is
> dusty it will suck in the dust also. Most time the air comes from inside
> the case, so the air comes through the case intakes. Most cases have a
> screen on the intakes. Short answer: it probably doesn't matter where in
> the case it is, but if you keep your case on the floor and never clean
> your screens or blow out the case then it might see a greater than
> average flow of dust
It seems to me that, if the intake areas become choked with dust,
overheating will become a problem before PSU sucking dust will become a
problem.
Re: Power supply at the bottom of the computer chassis?
On Sun, 14 Mar 2010 15:28:24 GMT, "SteveH"
<steve.houghREMOVE@THISblueyonder.co.uk> wrote:
>Man-wai Chang to The Door (33600bps) wrote:
>>> No, a PSU in the bottom of the case doesn't vacuum up anything,
>>> unless the case designer was stupid enough to put holes in the case
>>> directly under the PSU fan, which certainly isn't the case in my
>>> Antec P180.
>>
>> You talking about a dust filter? I was talking about a regular hole!
>> The old design (power supply at the top) should be more tolerant to
>> dust.
>
>I'm talking about no hole at all. The PSU in my P180 gets its air from the
>front of the case, the same as if it was at the top, except its /nearer/ to
>the source of incoming cool air, which should be better for it.
Perhaps better for it, but that also means less air flows
over the rest of the parts in the system so they get cooled
less, unless you have even more case airflow to compensate
which increases the dust level.
If you regularly clean out the system or it has good (high
surface area) filtered intake then that can work out fine,
but otherwise due to gravity a PSU mounted at the bottom
will have a higher rate of dust buildup than one mounted at
the top and IMO, cleaning dust out of a PSU is more of a
pain than anything else because you have to unscrew it from
the case, unplug a few cables usually, take the cover off
(which often voids the warranty).
Re: Power supply at the bottom of the computer chassis?
On Sun, 14 Mar 2010 17:07:57 -0400, ToolPackinMama
<philnblanc@comcast.net> wrote:
>On 3/14/2010 8:03 AM, Man-wai Chang to The Door (33600bps) wrote:
>>> No, a PSU in the bottom of the case doesn't vacuum up anything, unless
>>> the
>>> case designer was stupid enough to put holes in the case directly
>>> under the
>>> PSU fan, which certainly isn't the case in my Antec P180.
>>
>> You talking about a dust filter? I was talking about a regular hole!
>> The old design (power supply at the top) should be more tolerant to dust.
>
>Just keep your local area free of dust. If you don't like
>housecleaning, hire somebody.
>
Depends on cleaning interval... Even if you clean the house
you would clean it when there is something to clean, right?
If there is something to clean in the house, at the same
time that dust was in the air being sucked through the
system.
Obviously cleaning house regularly will greatly reduce the
frequency of cleaning out a computer, but IMO one of the
best alternatives is to use a room air cleaner so at least a
% of the air is cleaned by it's filter instead of being
trapped in the computer... or put really good filter panels
on the computer and it becomes the room air cleaner.
Re: Power supply at the bottom of the computer chassis?
kony wrote:
> On Sun, 14 Mar 2010 15:28:24 GMT, "SteveH"
> <steve.houghREMOVE@THISblueyonder.co.uk> wrote:
>
>> Man-wai Chang to The Door (33600bps) wrote:
>>>> No, a PSU in the bottom of the case doesn't vacuum up anything,
>>>> unless the case designer was stupid enough to put holes in the case
>>>> directly under the PSU fan, which certainly isn't the case in my
>>>> Antec P180.
>>>
>>> You talking about a dust filter? I was talking about a regular hole!
>>> The old design (power supply at the top) should be more tolerant to
>>> dust.
>>
>> I'm talking about no hole at all. The PSU in my P180 gets its air
>> from the front of the case, the same as if it was at the top, except
>> its /nearer/ to the source of incoming cool air, which should be
>> better for it.
>
> Perhaps better for it, but that also means less air flows
> over the rest of the parts in the system so they get cooled
> less, unless you have even more case airflow to compensate
> which increases the dust level.
>
Yes and no. 140mm fan in the top of the case, 120 in the back, filtered 120
in the front, 140 on the HSF and a twin fan Arctic cooling thingy on my
video card. That do?
--
SteveH
Re: Power supply at the bottom of the computer chassis?
> I'm talking about no hole at all. The PSU in my P180 gets its air from the
> front of the case, the same as if it was at the top, except its /nearer/ to
> the source of incoming cool air, which should be better for it.
A typical power supply assumed you to put it at the top of chassis, and
opening at the bottom and the front for air intake. If you mounted it at
the bottom (that doesn't have a hole), the bottom air intake of the
original design would not be functioning!!!
I have never heard of a PSU manufacturer selling a PSU tailored for
bottom mounting! Could you name one?
--
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Re: Power supply at the bottom of the computer chassis?
> Just keep your local area free of dust. If you don't like housecleaning,
> hire somebody.
Your Honor:
This mean a air purifier, and thus a more expensive electricity bill! I
rather not a chassis that put the PSU at the bottom!
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Re: Power supply at the bottom of the computer chassis?
> It seems to me that, if the intake areas become choked with dust,
> overheating will become a problem before PSU sucking dust will become a
> problem.
The original ATX design didn't expect a power supply at the bottom of
the computer chassis, did it? Not even BTX (or CTX?) expected that, did it?
I guess I should stop thinking about these chassis.
--
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/ v \ Simplicity is Beauty! May the Force and Farce be with you!
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Re: Power supply at the bottom of the computer chassis?
On 3/15/2010 8:20 AM, Man-wai Chang to The Door (33600bps) wrote:
>> It seems to me that, if the intake areas become choked with dust,
>> overheating will become a problem before PSU sucking dust will become a
>> problem.
>
> The original ATX design didn't expect a power supply at the bottom of
> the computer chassis, did it? Not even BTX (or CTX?) expected that, did it?
>
> I guess I should stop thinking about these chassis.
>
You mount the power supply "upside down" in these cases (fan intake
point up). It is a good design for gaming cases that can then mount an
exhaust fan on the top of the case.
Re: Power supply at the bottom of the computer chassis?
> You mount the power supply "upside down" in these cases (fan intake
> point up). It is a good design for gaming cases that can then mount an
> exhaust fan on the top of the case.
Need to read the manual of the chassis to confirm your statement...
--
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Re: Power supply at the bottom of the computer chassis?
Man-wai Chang to The Door (33600bps) wrote:
>> I'm talking about no hole at all. The PSU in my P180 gets its air
>> from the front of the case, the same as if it was at the top, except
>> its /nearer/ to the source of incoming cool air, which should be
>> better for it.
>
> A typical power supply assumed you to put it at the top of chassis,
> and opening at the bottom and the front for air intake. If you
> mounted it at the bottom (that doesn't have a hole), the bottom air
> intake of the original design would not be functioning!!!
>
> I have never heard of a PSU manufacturer selling a PSU tailored for
> bottom mounting! Could you name one?
Try looking at the PC cases. The PSU (obviously?) isn't mounted so the
intake fan is blocked, there is a gap for air to get in.
Re: Power supply at the bottom of the computer chassis?
On 3/15/2010 9:32 AM, Man-wai Chang to The Door (33600bps) wrote:
>> You mount the power supply "upside down" in these cases (fan intake
>> point up). It is a good design for gaming cases that can then mount an
>> exhaust fan on the top of the case.
>
> Need to read the manual of the chassis to confirm your statement...
>
As a rule, you should always confirm *anything* you read on the internet.
Re: Power supply at the bottom of the computer chassis?
Man-wai Chang to The Door (33600bps) wrote:
>> Just keep your local area free of dust. If you don't like
>> housecleaning, hire somebody.
>
> Your Honor:
>
> This mean a air purifier, and thus a more expensive electricity bill!
> I rather not a chassis that put the PSU at the bottom!
Well, nobody is forcing you to buy one, are they?
And I can't swear for all of them, but some of the Antec cases do this and
they work just fine.
Re: Power supply at the bottom of the computer chassis?
TVeblen wrote:
> On 3/15/2010 8:20 AM, Man-wai Chang to The Door (33600bps) wrote:
>>> It seems to me that, if the intake areas become choked with dust,
>>> overheating will become a problem before PSU sucking dust will
>>> become a problem.
>>
>> The original ATX design didn't expect a power supply at the bottom of
>> the computer chassis, did it? Not even BTX (or CTX?) expected that,
>> did it? I guess I should stop thinking about these chassis.
>>
> You mount the power supply "upside down" in these cases (fan intake
> point up). It is a good design for gaming cases that can then mount an
> exhaust fan on the top of the case.
I didn't/couldn't in my P180 (Antec PSU as well), but it doesn't matter as
the PSU isn't in contact with the bottome of the case anyway, there is a gap
for airflow.
Re: Power supply at the bottom of the computer chassis?
On Mar 14, 5:29 am, "Man-wai Chang to The Door (33600bps)"
<toylet.toy...@gmail.com> wrote:
> Would it suck a lot of dust like a vacuum cleaner? :)
Yes, they get filthy - top and bottom - whatever. Matter of time,
matter of build. Matter of who is looking and what looks disgusting.
Even if there were no airflow, everything green and passively cooled,
say along an intel atom and its HS's fins only, there's still
convection air circulation (ruling out an air-tight, sealed case).
More along QC - at a ramp when it's time to do something about it.
Take it all down, including the PS, put newspapers under everything,
tooth and a small, soft paintbrush, and a spray bottle to flush with
alcohol, change them until the newspapers show no yellow in the
runoff. Take spray tuner fluid or contact cleaner, if necessary swabs,
and rework the contact junctions after using an eraser over the flat
connectors on any insertion boards - PCI & etc.
Trick is a knack not to break anything, destroy the system or
yourself. Not sure about ratings inside Power Supplies, but
capacitors can be deadly. Good sense and respect for opening things
up isn't a bad idea.
I've a 60-gal. air compressor. Some people freak when I say I also
use that to bring one back to nearly as-new Condition.
Re: Power supply at the bottom of the computer chassis?
On Mon, 15 Mar 2010 10:33:23 GMT, "SteveH"
<steve.houghREMOVE@THISblueyonder.co.uk> wrote:
>kony wrote:
>> On Sun, 14 Mar 2010 15:28:24 GMT, "SteveH"
>> <steve.houghREMOVE@THISblueyonder.co.uk> wrote:
>>
>>> Man-wai Chang to The Door (33600bps) wrote:
>>>>> No, a PSU in the bottom of the case doesn't vacuum up anything,
>>>>> unless the case designer was stupid enough to put holes in the case
>>>>> directly under the PSU fan, which certainly isn't the case in my
>>>>> Antec P180.
>>>>
>>>> You talking about a dust filter? I was talking about a regular hole!
>>>> The old design (power supply at the top) should be more tolerant to
>>>> dust.
>>>
>>> I'm talking about no hole at all. The PSU in my P180 gets its air
>>> from the front of the case, the same as if it was at the top, except
>>> its /nearer/ to the source of incoming cool air, which should be
>>> better for it.
>>
>> Perhaps better for it, but that also means less air flows
>> over the rest of the parts in the system so they get cooled
>> less, unless you have even more case airflow to compensate
>> which increases the dust level.
>>
>Yes and no. 140mm fan in the top of the case, 120 in the back, filtered 120
>in the front, 140 on the HSF and a twin fan Arctic cooling thingy on my
>video card. That do?
I don't recommend using cases with top mounted fans.
Gravity works against them causing dust to enter when it
isn't on, things may fall down inside, and generally a fan
there simply is not needed.
Plus, since these are generally exhaust fans it is very
difficult to have enough filtered intake fans/airflow to
create the positive pressue you want if a filter is to be
effective over the intake fans instead of having negative
pressure which draws in dusty air everywhere there is a
small gap or hole in the case.
Re: Power supply at the bottom of the computer chassis?
>> Need to read the manual of the chassis to confirm your statement...
>>
> As a rule, you should always confirm *anything* you read on the internet.
I read some manuals and they did NOT teach the buyers to mount the PSU
upside down.
--
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Re: Power supply at the bottom of the computer chassis?
> Well, nobody is forcing you to buy one, are they?
I knew!
> And I can't swear for all of them, but some of the Antec cases do this and
> they work just fine.
I noticed that.
--
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/ v \ Simplicity is Beauty! May the Force and Farce be with you!
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Re: Power supply at the bottom of the computer chassis?
"Man-wai Chang to The Door (33600bps)" <toylet.toylet@gmail.com> wrote in
message news:hnia9l$h7v$1@news.eternal-september.org...
>
> Would it suck a lot of dust like a vacuum cleaner? :)
Only if you are comparing it to a very inefficient vacuum cleaner :)
Seriously though, yes any dust in the air will get sucked through it. Whilst
a vacuum cleaner is designed to catch the dust and not expel it, hopefully
the majority of the dust will pass straight through the power supply.
However, that's only most not all.
So the next question to ask is how dusty is the place where you would be
placing the PC? I occasionally need to open up the pcs & servers at work
(fit memory, cards, replace disks etc) and the pcs at work have very little
dust in them, certainly not enough to worry about. Contrast that with my pcs
at home, where they do seem to attact dust - I even have it on my calendar
to vacuum them out every 3 months or so (if I leave it longer I can start to
hear the cpu fan straining). Even then it tends to be the cpu fan which get
clogged up first - although when I'm vacuuming out the case I normally try
to vacuum the power supply as best I can without removing it.
I have heard it said that pcs shouldn't be placed on the floor because of
dust, but I'm not sure how much difference that makes since most pcs at work
are straight on the floor and my ones at home (which suffer from dust]
aren't.
Re: Power supply at the bottom of the computer chassis?
> I have heard it said that pcs shouldn't be placed on the floor because
> of dust, but I'm not sure how much difference that makes since most pcs
> at work are straight on the floor and my ones at home (which suffer from
> dust] aren't.
With the old approach (ie, the power supply at the top of the chassis),
the dust needs to travel a longer way from the intake to the power supply.
With bottom-mounting, the dust reaches the PSU directly from the intake.
--
@~@ Might, Courage, Vision, SINCERITY.
/ v \ Simplicity is Beauty! May the Force and Farce be with you!
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> with my pcs at home, where they do seem to attact dust - I even have it
> on my calendar to vacuum them out every 3 months or so (if I leave it
> longer I can start to hear the cpu fan straining). Even then it tends to
> be the cpu fan which get clogged up first - although when I'm vacuuming
> out the case I normally try to vacuum the power supply as best I can
> without removing it.
Do you open the power supply and clean the dust there?
Would the warranty be broken by doing so?
--
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Man-wai Chang to The Door (33600bps) wrote:
>> with my pcs at home, where they do seem to attact dust - I even have it
>> on my calendar to vacuum them out every 3 months or so (if I leave it
>> longer I can start to hear the cpu fan straining). Even then it tends to
>> be the cpu fan which get clogged up first - although when I'm vacuuming
>> out the case I normally try to vacuum the power supply as best I can
>> without removing it.
>
> Do you open the power supply and clean the dust there?
>
> Would the warranty be broken by doing so?
>
For power supplies, where one of the screws on the top lid is covered
with a "warranty void if removed" sticker, yes, the warranty would be
voided.
You can blow a lot of the dust out of the supply, from the exterior,
through the vents.
Power supply at the bottom of the computer chassis? 
Linear Mode
