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Guest
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 Posted: Thu Nov 06, 2003 6:09 am Post subject: Does a Pentium 3 800MHz need a fan? |
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....or is passive cooling enough. I want to reuse my old motherboard for
something else, but it can't make a lot of noise... |
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DaveW
Guest
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| Posted: Thu Nov 06, 2003 6:20 am Post subject: Re: Does a Pentium 3 800MHz need a fan? |
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It puts out a LOT of heat. If you don't want to fry it, get a fan.
--
DaveW
<Nittaku> wrote in message
news:3fa990c7$0$30716$ba620e4c@reader1.news.skynet.be...
| Quote: | ...or is passive cooling enough. I want to reuse my old motherboard for
something else, but it can't make a lot of noise...
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stacey
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| Posted: Thu Nov 06, 2003 7:44 am Post subject: Re: Does a Pentium 3 800MHz need a fan? |
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<Nittaku> wrote:
| Quote: | ...or is passive cooling enough. I want to reuse my old motherboard for
something else, but it can't make a lot of noise...
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=MAYBE= if you unclock/undervolt it a bunch?
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Stacey |
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kony
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| Posted: Thu Nov 06, 2003 11:20 am Post subject: Re: Does a Pentium 3 800MHz need a fan? |
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On Thu, 6 Nov 2003 01:09:37 +0100, <Nittaku> wrote:
| Quote: | ...or is passive cooling enough. I want to reuse my old motherboard for
something else, but it can't make a lot of noise...
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As Stacey mentioned, you might consider underclocking, undervolting
it. Running on a 66MHz FSB, 533MHz CPU speed, it might run stable at
around 1.4-1.5V, wouldn't need a fan on the heatsink then though you'd
still need normal case airflow, assuming the typical motherboard with
socket more-or-less right under the power supply air intake (that is,
you should use a power supply with this air intake on the underside.
You don't really need to go to that much trouble though, a P3 800 is
not very hot running, relatively speaking. Intel's datasheets would
give a max wattage but it's in the ballpark of 22W of heat under a
fairly high load situation, but a lot lower if mostly sitting idle on
a motherboard and OS that's ACPI supportive. All but the smallest or
cheapest of heatsinks should be OK with a low-RPM, quiet fan on them.
You might just be able to take the easy way out, get a power supply
fan adapter and run the current fan at 5-7V.
Dave |
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stacey
Guest
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| Posted: Thu Nov 06, 2003 11:33 am Post subject: Re: Does a Pentium 3 800MHz need a fan? |
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kony wrote:
| Quote: |
You don't really need to go to that much trouble though, a P3 800 is
not very hot running, relatively speaking. Intel's datasheets would
give a max wattage but it's in the ballpark of 22W of heat under a
fairly high load situation, but a lot lower if mostly sitting idle on
a motherboard and OS that's ACPI supportive. All but the smallest or
cheapest of heatsinks should be OK with a low-RPM, quiet fan on them.
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It's been a while since I looked at one of those but would a HS off an
athlon fit? If so a HS off a later model AMD with a power supply that blows
across the CPU (some have the fan on the inside that does this) would
probably be plenty even at 800Mhz.
--
Stacey |
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philo
Guest
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| Posted: Thu Nov 06, 2003 11:53 pm Post subject: Re: Does a Pentium 3 800MHz need a fan? |
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<Nittaku> wrote in message
news:3fa990c7$0$30716$ba620e4c@reader1.news.skynet.be...
| Quote: | ...or is passive cooling enough. I want to reuse my old motherboard for
something else, but it can't make a lot of noise...
it definately needs a fan |
what i sometimes do is get rid of the hi-rpm and noisy cpu fan
then mount a case fan in such a way as to blow down directly on the cpu
heat sink
the larger fan spins at a lower rpm so is quieter
and due to it;s size...actually cools better! |
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~misfit~
Guest
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| Posted: Fri Nov 07, 2003 2:16 am Post subject: Re: Does a Pentium 3 800MHz need a fan? |
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philo wrote:
| Quote: | Nittaku> wrote in message
news:3fa990c7$0$30716$ba620e4c@reader1.news.skynet.be...
...or is passive cooling enough. I want to reuse my old motherboard
for something else, but it can't make a lot of noise...
it definately needs a fan
what i sometimes do is get rid of the hi-rpm and noisy cpu fan
then mount a case fan in such a way as to blow down directly on the
cpu heat sink
the larger fan spins at a lower rpm so is quieter
and due to it;s size...actually cools better!
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....and you can duct it with a home-made duct and even a home-made shroud,
maybe pull/push the air through the fins laterally (works really well).
Cardboard is fine for this. I'm thinking of doing it on my Athlon XP.
--
~misfit~ |
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