Power supply at the bottom of the computer chassis?
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From: TVeblen on 15 Mar 2010 10:28 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.
From: SteveH on 15 Mar 2010 10:30 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. -- SteveH
From: SteveH on 15 Mar 2010 10:31 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. -- SteveH
From: Flasherly on 15 Mar 2010 13:13 On Mar 14, 5:29 am, "Man-wai Chang to The Door (33600bps)" <toylet.toy...(a)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.
From: kony on 15 Mar 2010 14:06
On Mon, 15 Mar 2010 10:33:23 GMT, "SteveH" <steve.houghREMOVE(a)THISblueyonder.co.uk> wrote: >kony wrote: >> On Sun, 14 Mar 2010 15:28:24 GMT, "SteveH" >> <steve.houghREMOVE(a)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. |