home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!mcsun!Germany.EU.net!math.fu-berlin.de!umn.edu!csus.edu!decwrl!sun-barr!news2me.ebay.sun.com!grapevine.EBay.Sun.COM!sunicnc.France.Sun.COM!smckinty
- From: smckinty@sunicnc.France.Sun.COM (Steve McKinty - Sun ICNC)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: A3000: Heating up?
- Date: 3 Sep 1992 16:14:11 GMT
- Organization: SunConnect
- Lines: 27
- Sender: smckinty@France.Sun.COM (Steve McKinty - Sun ICNC)
- Distribution: world
- Message-ID: <185dkjINN62m@grapevine.EBay.Sun.COM>
- References: <aqyFqB1w164w@qed.cts.com>
- NNTP-Posting-Host: hardy.france.sun.com
-
- In article <aqyFqB1w164w@qed.cts.com>, analogki@qed.cts.com (Jeff Robertson) writes:
- >
- > I have an Amiga 3000 (25Mhz) with 52meg Quantum HD, two internal floppy
- > drives, 2megs of CHIP RAM and 4megs of FAST RAM. My mom-board rev# is 8.9.
- >
- > It occurred to me one day that my power supply's fan shouldn't be BLOWING
- > air INTO the machine, as every power supply I have ever seen on a 3000 was
- > SUCKING air OUT! The same is true for every other power supply for any
- > computer I have ever seen. Makes sense, too. Sucking air OUT of the machine
- > seems more efficient in cooling than forcing it in. This action also keeps
- > DUST from piling up on the IC's.
- >
- I would disagree. If the fan sucks air out, then the incoming air gets in
- through all the holes in the case, and is not filtered. By making the fan
- blow air in, you can put a filter over the fan intake & screen out the
- dust (I haven't got an A3000, I don't know if there is a filter there, but
- that's commonplace on larger systems).
-
- As to cooling, if the hottest objects are near the fan, making it blow
- in gets the cool ambient air straight to them. Sucking it out means that
- the air has already been heated up by the rest of the system by the time it
- gets to them.
-
- My preference would be to leave things as C= did, at least that way if it
- does die your warranty is intact!
-
- Steve
-