## Re: CPU Speed, Heat, etc. (was Re: [NTO] Math MB > GB)

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• Hi Jody, All; ... The hottest I ve seen my PIII 667 MHz run is about 25 deg F above the ambient temperature. I have standard PS, Case and CPU fans. I use
Message 1 of 20 , May 6, 2002
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Hi Jody, All;

>FWIW, my CPU seems to run at about 140+ degrees F. I though that
>was pretty hot myself.

The hottest I've seen my PIII 667 MHz run is about 25 deg F above
the ambient temperature. I have standard PS, Case and CPU fans.
I use MBProbe http://mbprobe.livewiredev.com/
to monitor the voltages, fan speeds and temps.

Based on what I've read, AMD CPUs do run hotter than Intel units
and AMD gurus recommend using higher output CPU fans than those
normally used by system builders.

Now, for anyone who cares :-))

Scientific Standards
1 teraX (10 E12) = 1000 gigaX 1 tHz (tera hertz)
1 gigaX (10 E9) = 1000 megaX 1 gHz
1 megaX (10 E6) = 1000 kiloX 1 mHz
1 kiloX (10 E3) = 1000 X 1 kHz

Computer nomenclature
1 teraX (1024 ^4) = 1024 gigaX 1 TB (1 tera bytes)
1 gigaX (1024 ^3) = 1024 megaX 1 GB
1 megaX (1024 ^2) = 1024 kiloX 1 MB
1 kiloX (1024 ^1) = 1024 X 1 KB

10 Exx = 10 to the power xx or exponent xx
1024 ^x = 1024 to the power x or exponent x
The computer nomenclature is generally accepted but not a standard.
• Hi DA and Len, Thanks for the replies! We normally keep the house at 74-78 degrees with a 1 degree A/C kick-in difference. (It s strange how we keep our
Message 2 of 20 , May 6, 2002
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Hi DA and Len,

Thanks for the replies!

We normally keep the house at 74-78 degrees with a 1 degree A/C
kick-in difference. (It's strange how we keep our houses in the
winter/summer. We make it fairly cold in the summer all the way
down to 74, but in the winter, we like it 80-82. ;)

I've had the sides off my tower since day one and also got the
large one for better air circulation. I have a PII ball bearing
fan for my CPU, but did not get the others yet to mount on the
back of the case. I'll try putting a full size floor fan by its
side. My ceiling fan circulates enough air, but then I have to
put up with the "cold" and papers blowing around.

Off-topic...
In the long distance telephone switches I use to work in we had
to keep the A/C at 68 degrees which blew up from an A/D'd tile
floor with large fans at the top of each bay, shelves for PCB's
about 1' x 3' x 6' in metal cabinets about 3' deep. There were
rows and rows of them. Man, it was always cold on the
graveyard/maintenance shift. (We could only do maintenance from
12:00 to 4-5:00am unless of course the whole switch went down -
which happened in very rare cases due to redundancy.) Out of
over 10 years of that work I never had one full outage. :)
Companies like MCI have a fit when they start loosing 5 million
an hour in billing revenue. <g>

>I think the temperature is borderline, but acceptable. One of
>the things to keep in mind is: What happens when the ambient
>temperature goes up in the summer? My server has a thermostatic
>fan, and you can really hear it kick in when the weather is hot.
>(I don't have air conditioning) The higher temperatures usually
>don't result in immediate failure, but reduce the life of the cpu
>and all the other components too.

Happy Topics,
Jody

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• Len,Jody, et al, ... FWIW The PIII will shut itself down if it over heats. The PIV will slow itself down until the temp is within normal operating range. The
Message 3 of 20 , May 6, 2002
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Len,Jody, et al,

At 09:28 AM 5/6/2002 -0700, you wrote:
>Hi Jody, All;
>
>>FWIW, my CPU seems to run at about 140+ degrees F. I though that
>>was pretty hot myself.
>
>The hottest I've seen my PIII 667 MHz run is about 25 deg F above
>the ambient temperature. I have standard PS, Case and CPU fans.
>I use MBProbe http://mbprobe.livewiredev.com/
>to monitor the voltages, fan speeds and temps.
>
>Based on what I've read, AMD CPUs do run hotter than Intel units
>and AMD gurus recommend using higher output CPU fans than those
>normally used by system builders.

FWIW

The PIII will shut itself down if it over heats.

The PIV will slow itself down until the temp is within normal operating range.

The AMD's just burn themselves up (smoke and fire both).

You can see the test results here:

http://www4.tomshardware.com/cpu/01q3/010917/heatvideo-01.html

BTW the thermal paste between your heatsink and processor will dry out in time and will not be as effective.

It is a good idea to replace it every year or so, especially with these high speed/temperature processors.

http://www.electronics-cooling.com/Resources/EC_Articles/SEP96/sep96_01.htm

http://www.overclockers.com/articles531/

Obviously, dirty fans are not good either.

Just my 2 cents worth.

Regards,

Jim
• I ve had the sides off my tower since day one and also got the large one for better air circulation. How in the world can you stand the noise? I m, in fact,
Message 4 of 20 , May 6, 2002
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"I've had the sides off my tower since day one and also got the large
one for better air circulation."

How in the world can you stand the noise? I'm, in fact, thinking of
covering/boxing my own tower with some thick noise insulation material
--- I love silence!

Nicholas

-----Original Message-----
From: Jody [mailto:av1611@...]
Sent: Monday, May 06, 2002 11:28 AM
To: ntb-OffTopic@yahoogroups.com
Subject: Re: CPU Speed, Heat, etc. (was Re: [NTO] Math MB > GB)

Hi DA and Len,

Thanks for the replies!

We normally keep the house at 74-78 degrees with a 1 degree A/C kick-in
difference. (It's strange how we keep our houses in the winter/summer.
We make it fairly cold in the summer all the way down to 74, but in the
winter, we like it 80-82. ;)

I've had the sides off my tower since day one and also got the large one
for better air circulation. I have a PII ball bearing fan for my CPU,
but did not get the others yet to mount on the back of the case. I'll
try putting a full size floor fan by its side. My ceiling fan
circulates enough air, but then I have to put up with the "cold" and
papers blowing around.

Off-topic...
In the long distance telephone switches I use to work in we had to keep
the A/C at 68 degrees which blew up from an A/D'd tile floor with large
fans at the top of each bay, shelves for PCB's about 1' x 3' x 6' in
metal cabinets about 3' deep. There were rows and rows of them. Man,
it was always cold on the graveyard/maintenance shift. (We could only
do maintenance from 12:00 to 4-5:00am unless of course the whole switch
went down - which happened in very rare cases due to redundancy.) Out
of over 10 years of that work I never had one full outage. :) Companies
like MCI have a fit when they start loosing 5 million an hour in billing
revenue. <g>

>I think the temperature is borderline, but acceptable. One of the
>things to keep in mind is: What happens when the ambient temperature
>goes up in the summer? My server has a thermostatic fan, and you can
>really hear it kick in when the weather is hot. (I don't have air
>conditioning) The higher temperatures usually don't result in
>immediate failure, but reduce the life of the cpu and all the other
>components too.

Happy Topics,
Jody

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• Hi Jody, ... Just something to watch out for: I had a computer that would overheat the disk drives if I removed the cover because the fans then couldn t draw
Message 5 of 20 , May 6, 2002
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Hi Jody,

> I've had the sides off my tower since day one and also got the
> large one for better air circulation.

Just something to watch out for:
I had a computer that would overheat the disk drives if I removed
the cover because the fans then couldn't draw air over the drives.
Removing the sides/cover upsets the air flow pattern.

DA
• Hi DA and Nick, ... I ve been listening to machines making background noise for near 30 years now. It is when I don t hear it that I start getting concerned.
Message 6 of 20 , May 6, 2002
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Hi DA and Nick,

>> I've had the sides off my tower since day one and also got the
>> large one for better air circulation.

> How in the world can you stand the noise? I'm, in fact,
> thinking of covering/boxing my own tower with some thick noise
> insulation material --- I love silence!

I've been listening to machines making background noise for near
30 years now. It is when I don't hear it that I start getting
concerned. ;)

Off topic warning... (DA, I replied to you below.)
In large computer rooms, well outside the room itself somewhere,
there are huge rectifiers which convert AC (480) to DC. The
equipment I worked on varied but most of it had 24 huge batteries
(about 1' across x 2' high x 2' deep). Each of those was a cell
like in a car battery, the total making up the battery itself.
The battery system was of course used as back up power, but also
used to filter the DC from the rectifier outputs which would
still have an AC ripple riding on the DC which is straight lined,
at least on an Oscilloscope. The output of them is a pure -48VDC
and was fed into each frame's power supplies having the shelves
of large PCB's and then split up into the various low DC voltages
needed. Anyhow, all that equipment makes a humming noise.

Do you know why the rectifiers hum?

scroll down

down

down

Because they forgot the words, silly. ;)

>Just something to watch out for:
>I had a computer that would overheat the disk drives if I removed
>the cover because the fans then couldn't draw air over the
>drives. Removing the sides/cover upsets the air flow pattern.

That makes good sense if one has all the fans installed he
should. I have an onboard fan on my video card, one on the CPU,
and one inside my pwr supply which sucks out. I hooked up my
\$8.98 floor/window fan from WalMart on the side of my computer.
The pwr supply no longer has hot air blowing out the back, my
hard drives cooled down considerably, and there is cool air
flowing out the other side of the computer. (I have to check the
CPU in CMOS.)

Off topic warning...
In the old days we had to have a number of those big fans on
stands (like in public schools) to help keep the equipment cooled
down because AC was not always there <g> so we sometimes had to
go to emergency procedures 'cause the batteries were only good
for so long, and one switch I was at in the Army did not have
reliable generators. Civilians kept them up, so it was sort of
out of our hands. Those were the good 'ol days when there were
always problem to troubleshoot and quite a challenge to keep up
and running. Some military Autovon switches back then would go
down for days at a time. ;)

Happy Topics,
Jody

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• Hi Jody, I ve done that WalMart trick too. It sounds like you have everything thermal under control. DA
Message 7 of 20 , May 6, 2002
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Hi Jody,

I've done that WalMart trick too. It sounds like you have
everything thermal under control.

DA

> I hooked up my
> \$8.98 floor/window fan from WalMart on the side of my computer.
• Hi DA, You know, if they do not sell them, I bet a fella in the A/C and Heating could fabricate a small A/C unit that could mount wherever and really have it
Message 8 of 20 , May 7, 2002
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Hi DA,

You know, if they do not sell them, I bet a fella in the A/C and
Heating could fabricate a small A/C unit that could mount
wherever and really have it done right then. ;)

(Silly me forgot that the fax stuff on the other thread was a
matter of making the fax the default printer, or selected printer
when fax'n. I would image all the guy would have to do is setup
his DUN (if not already, connect, go through the fax motions
including picking the fax for the printer, and it should fly.)

>I've done that WalMart trick too. It sounds like you have
>everything thermal under control.
>
>DA
>
>> I hooked up my \$8.98 floor/window fan from WalMart on the side
>> of my computer.

Happy Topics,
Jody

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• ... Hi Jody, DA, Overclockers and other experimenters have already Been there, Done that . Thermoelectric cooling units, and even, water(fluid) cooling units
Message 9 of 20 , May 7, 2002
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On 5/7/02 9:42 AM, Jody wrote:
> Hi DA,
>
> You know, if they do not sell them, I bet a fella in the A/C and
> Heating could fabricate a small A/C unit that could mount
> wherever and really have it done right then. ;)
>

Hi Jody, DA,

Overclockers and other experimenters have already "Been there, Done
that". Thermoelectric cooling units, and even, water(fluid) cooling
units have been adapted to CPU's for quite a while now.

The thermo-units are a solid state devices that has been around for some
time that mounts on the cpu just like a cpu-fan, the fluid units are
like a car radiator. A reservoir that water is circulated through is
physically attached to the cpu.

The water is circulated through the reservoir, just as an engine block,
then out through a radiator to dissipate heat.

hrs
• Jody, ... The old Cray SuperComputers had the CPU s and Ram in a refrigerator.:-) You can get cases today that come with A/C units. COOL is the word!! Jim
Message 10 of 20 , May 7, 2002
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Jody,

At 09:42 AM 5/7/2002 -0500, you wrote:
>Hi DA,
>
>You know, if they do not sell them, I bet a fella in the A/C and
>Heating could fabricate a small A/C unit that could mount
>wherever and really have it done right then. ;)

The old Cray SuperComputers had the CPU's and Ram in a refrigerator.:-)

You can get cases today that come with A/C units.

COOL is the word!!

Jim
• Hi Jim, ... ARGH! That is as bad as my rectifiers humming because they forgot the words. ;) Happy Topics, Jody The NoteTab Off-Topic List
Message 11 of 20 , May 7, 2002
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Hi Jim,

>The old Cray SuperComputers had the CPU's and Ram in a refrigerator.:-)
>
>You can get cases today that come with A/C units.
>
>COOL is the word!!

ARGH! That is as bad as my rectifiers humming because they
forgot the words. ;)

Happy Topics,
Jody

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• Hi Jody/Jim, I don t think Jim was joking, were you Jim? DA
Message 12 of 20 , May 7, 2002
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Hi Jody/Jim,

I don't think Jim was joking, were you Jim?

DA

Jody wrote:
>
> Hi Jim,
>
> >The old Cray SuperComputers had the CPU's and Ram in a refrigerator.:-)
> >
> >You can get cases today that come with A/C units.
> >
> >COOL is the word!!
>
> ARGH! That is as bad as my rectifiers humming because they
> forgot the words. ;)
>
> Happy Topics,
> Jody
>
> The NoteTab Off-Topic List
> mailto:ntb-OffTopic-Subscribe@yahoogroups.com
> mailto:ntb-OffTopic-UnSubscribe@yahoogroups.com
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
• DA, Nope, I was as serious as a heart attack, they really did.
Message 13 of 20 , May 7, 2002
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DA,

Nope, I was as serious as a heart attack, they really did.

At 09:59 PM 5/7/2002 -0700, you wrote:
>Hi Jody/Jim,
>
>I don't think Jim was joking, were you Jim?
>
>DA
>
>Jody wrote:
>>
>> Hi Jim,
>>
>> >The old Cray SuperComputers had the CPU's and Ram in a refrigerator.:-)
>> >
>> >You can get cases today that come with A/C units.
>> >
>> >COOL is the word!!
>>
>> ARGH! That is as bad as my rectifiers humming because they
>> forgot the words. ;)
>>
• Hi Jim, I certainly believed they have/had the units. What I was talking about was what I thought was a play on words. The refrigerators were certainly cool,
Message 14 of 20 , May 8, 2002
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Hi Jim,

I certainly believed they have/had the units. What I was talking
about was what I thought was a play on words. The refrigerators
were certainly cool, but they are "way too kewl" (COOL) also. ;)
Or, is COOL an acronym?

I think it was Harvey that mentioned they already had some type
of thermal control units. I was thinking more on the lines of an
everyday (miniature though) A/C unit say the size of a pwr supply
that would mount right inside a tower case where a pwr supply
would go. It would cool big time, and also draw the moisture
out of the air and help with corrosion. A long time NoteTabber,
Dr. ??? in Hawaii, told me that they had to buy new computers
every two years because of the humidly and salty air destroying
them.

>>I don't think Jim was joking, were you Jim?
>>
>>DA
>>
>>Jody wrote:
>>>
>>> Hi Jim,
>>>
>>>>The old Cray SuperComputers had the CPU's and Ram in a refrigerator.:-)
>>>>
>>>>You can get cases today that come with A/C units.
>>> >
>>> >COOL is the word!!
>>>
>>> ARGH! That is as bad as my rectifiers humming because they
>>> forgot the words. ;)

Happy Topics,
Jody

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