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Page 2 of 3
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| Author |
Message |
Bill Stillman
Joined: 07 May 2007
Posts: 4
|
 Which is better? Leave computer on all day or start up sev..
Oh, forgot,
I leave both my home and office machine running 24/7 as I need to due to my
job. BUT I do turn off the monitor when I leave them un-attended for more
than an hour. Been running 24/7 for three years now.
"Bill Stillman" <icstude.TakeThisOut@advinc.com> wrote in message
news:%23LBv0l0UEHA.2520@TK2MSFTNGP12.phx.gbl...
> As both a home user, laptop owner and business network manager, I
recommend
> that you do not use a screen saver for the following reasons.
> 1. It will burn up your monitor about six times as fast as not using one.
> 2. Depending on the particular screen saver, the more graphics and
> animation, the more resources your computer will be using, both running
the
> screen saver and having it in the background to turn on after a period of
> time of non-use.
> 3 As us using a screen saver on a laptop, do not. a typical high
animation
> screen saver like the aquarium type, will cause your processor to heat up
> and if you did not make sure that both the intake and exhaust ports for
the
> fan are completely unobstructed, viola, dead laptop. I have responded to
> several calls where the first thing I see is that the laptop is sitting on
> some sort of soft material and has sunk into it blocking the air ports.
> Several office machines have been so obstructed that the obstruction is
> either so heat dried as to make it a fire hazard.
> Just my take...
>
> "BarbaraMN" <NOschissel.TakeThisOut@SPAMattNO.net> wrote in message
> news:Udtzc.67606$Gx4.8497@bgtnsc04-news.ops.worldnet.att.net...
> > Running windows XP at home, using dial-up, virus check and firewall
> >
> > Recently switched to XP from W98 where I left the computer on all day,
> with
> > a screensaver running all day. This new computer I have been turning
off
> > and on several times a day and not running a screensaver. Is all that
off
> &
> > on switching going to cause a problem? Thanks
> >
> >
>
>
|
| Tue Jun 15, 2004 10:35 pm |
|
 |
Rick Nutcase
Joined: 18 Aug 2007
Posts: 238
|
 Which is better? Leave computer on all day or start up sev..
The bit about large corporations is totally 100% incorrect. They leave them
running all the time, for the exact reasons that Bruce has given. I do not
personally know of any large corporation that has their employees do
anything other than logoff at days end. For that matter, I've seen employees
get lectured, and had their continued employment threatened, for either not
logging off properly or for shutting down. Both actions inhibit proper
network administration.
--
Best of Luck,
Rick Rogers aka "Nutcase" MS-MVP - Windows
Windows isn't rocket science! That's my other hobby!
http://mvp.support.microsoft.com/
Associate Expert - WinXP - Expert Zone
www.microsoft.com/windowsxp/expertzone
Win98 Help - www.rickrogers.org
"TCEBob" <tcebobc RemoveThis @comcast.com> wrote in message
news:uumJMEyUEHA.584@TK2MSFTNGP09.phx.gbl...
> Agreed. But I had the impression that BarbaraMN is running the system at
home.
> The money saved can be displaced by the inconvenience of booting every
time;
> that's for her to decide. A computer idling with disks off and monitor off
> should consume a small wattage, maybe 40?
>
> As I don't run and have never been in a large corporation, I accept what
you
> say. But I'm willing to bet that anyone with a door on his or her office
turns
> it on in the morning and off at night. And if I'm taking down $80k gross
am I
> going to get an award for saving the company $20.00 in computer
electricity?
>
> rs
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.704 / Virus Database: 460 - Release Date: 6/14/2004
>
>
|
| Tue Jun 15, 2004 10:44 pm |
|
 |
Rick Nutcase
Joined: 18 Aug 2007
Posts: 238
|
 Which is better? Leave computer on all day or start up sev..
The bit about large corporations is totally 100% incorrect. They leave them
running all the time, for the exact reasons that Bruce has given. I do not
personally know of any large corporation that has their employees do
anything other than logoff at days end. For that matter, I've seen employees
get lectured, and had their continued employment threatened, for either not
logging off properly or for shutting down. Both actions inhibit proper
network administration.
--
Best of Luck,
Rick Rogers aka "Nutcase" MS-MVP - Windows
Windows isn't rocket science! That's my other hobby!
http://mvp.support.microsoft.com/
Associate Expert - WinXP - Expert Zone
www.microsoft.com/windowsxp/expertzone
Win98 Help - www.rickrogers.org
"TCEBob" <tcebobc.TakeThisOut@comcast.com> wrote in message
news:uumJMEyUEHA.584@TK2MSFTNGP09.phx.gbl...
> Agreed. But I had the impression that BarbaraMN is running the system at
home.
> The money saved can be displaced by the inconvenience of booting every
time;
> that's for her to decide. A computer idling with disks off and monitor off
> should consume a small wattage, maybe 40?
>
> As I don't run and have never been in a large corporation, I accept what
you
> say. But I'm willing to bet that anyone with a door on his or her office
turns
> it on in the morning and off at night. And if I'm taking down $80k gross
am I
> going to get an award for saving the company $20.00 in computer
electricity?
>
> rs
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.704 / Virus Database: 460 - Release Date: 6/14/2004
>
>
|
| Tue Jun 15, 2004 10:44 pm |
|
 |
Ron Martell
Joined: 29 May 2007
Posts: 135
|
 Which is better? Leave computer on all day or start up sev..
"BarbaraMN" <NOschissel RemoveThis @SPAMattNO.net> wrote:
>Running windows XP at home, using dial-up, virus check and firewall
>
>Recently switched to XP from W98 where I left the computer on all day, with
>a screensaver running all day. This new computer I have been turning off
>and on several times a day and not running a screensaver. Is all that off &
>on switching going to cause a problem? Thanks
>
Turning a computer on and off multiple times a day is pretty much the
worst thing you can do.
Two main reasons:
1. The microchips and the circuit boards inside a computer are
composed of multiple layers of different types of materials. When
power is applied these components heat up and when the power is shut
off they cool down. All materials expand when they are heated and
contract when they cool down. And different materisls expand and
contract at different rates. This repeated expansion and contraction
will cause stresses at the points where these materials join because
they are expanding and contracting by different amounts. Repeated
stressing will eventually cause the equivalent of metal fatigue in
these materials resulting in failure of the join.
2. The hard drive in a computer is powered by an electric motor. All
electric motors are under the greatest loads and stresses when they
are first powered up, and that is when they are most likely to fail.
How often have you seen an electric motor fail while it was running at
normal speed? It does happen, but far more likely is that the
electric motor (washing machine, refrigerator, starter motor in your
car, whatever) will fail when it is turned on and power first begins
to flow. The more often an electric motor is powered on and off the
more likelihood there is of a failure during startup.
My basic motto is either "on and off once a day" or "leave running
24/7" - the pros and cons of each are pretty much equal.
Good luck
Ron Martell Duncan B.C. Canada
--
Microsoft MVP
On-Line Help Computer Service
http://onlinehelp.bc.ca
"The reason computer chips are so small is computers don't eat much."
|
| Wed Jun 16, 2004 3:08 am |
|
 |
Ron Martell
Joined: 29 May 2007
Posts: 135
|
 Which is better? Leave computer on all day or start up sev..
"BarbaraMN" <NOschissel DeleteThis @SPAMattNO.net> wrote:
>Running windows XP at home, using dial-up, virus check and firewall
>
>Recently switched to XP from W98 where I left the computer on all day, with
>a screensaver running all day. This new computer I have been turning off
>and on several times a day and not running a screensaver. Is all that off &
>on switching going to cause a problem? Thanks
>
Turning a computer on and off multiple times a day is pretty much the
worst thing you can do.
Two main reasons:
1. The microchips and the circuit boards inside a computer are
composed of multiple layers of different types of materials. When
power is applied these components heat up and when the power is shut
off they cool down. All materials expand when they are heated and
contract when they cool down. And different materisls expand and
contract at different rates. This repeated expansion and contraction
will cause stresses at the points where these materials join because
they are expanding and contracting by different amounts. Repeated
stressing will eventually cause the equivalent of metal fatigue in
these materials resulting in failure of the join.
2. The hard drive in a computer is powered by an electric motor. All
electric motors are under the greatest loads and stresses when they
are first powered up, and that is when they are most likely to fail.
How often have you seen an electric motor fail while it was running at
normal speed? It does happen, but far more likely is that the
electric motor (washing machine, refrigerator, starter motor in your
car, whatever) will fail when it is turned on and power first begins
to flow. The more often an electric motor is powered on and off the
more likelihood there is of a failure during startup.
My basic motto is either "on and off once a day" or "leave running
24/7" - the pros and cons of each are pretty much equal.
Good luck
Ron Martell Duncan B.C. Canada
--
Microsoft MVP
On-Line Help Computer Service
http://onlinehelp.bc.ca
"The reason computer chips are so small is computers don't eat much."
|
| Wed Jun 16, 2004 3:08 am |
|
 |
Hootie Bethesda
Joined: 09 Aug 2007
Posts: 2
|
 Which is better? Leave computer on all day or start up sev..
>-----Original Message-----
>Greetings --
>
> That's utter nonsense. You've absolutely no real
experience
>supporting computers in a large business or government
environment,
>have you?
>
> The time a piece of hardware is _most_ likely to fail
is during
>the power-up or power-down process. If you'd any serious
experience
>supporting large numbers of computers, you'd know this.
>
> Further, intelligent enterprises running large scale
networks
>insist upon the computers being left on at night, so that
virus scans,
>application and patch installation via SMS, backups,
etc., can be
>scheduled and accomplished without affecting worker
productivity.
>
> The savings in electricity costs generated by
powering off the PCs
>prove miniscule compared to the costs of otherwise
unnecessary repairs
>and the lost productivity caused by scheduling/performing
virus scans,
>application and patch installation via SMS, backups,
etc., during
>business hours.
>
>Bruce Chambers
>--
Can you say "specious"? The fact that most failures occur
during the power-up process doesn't mean that failure will
never happen otherwise, or that the power-up process, per
se, directly contributes to failure. There is no reliable
*empirical* data in existence that I know of to support
your contention. If you know of some, please provide
references. And make sure that you understand that
empirical data does not consist in quoting someone else's
unsupported assertions.
As an aside, distribution of patches and virus updates
across large networks is often done at boot time, and if
it's not, the installation ususally requires a reboot, so
lost productivity is not an issue. Of course, if you had
both a brain and experience, you'd know that.
|
| Wed Jun 16, 2004 9:24 am |
|
 |
Hootie Bethesda
Joined: 09 Aug 2007
Posts: 2
|
 Which is better? Leave computer on all day or start up sev..
>-----Original Message-----
>Greetings --
>
> That's utter nonsense. You've absolutely no real
experience
>supporting computers in a large business or government
environment,
>have you?
>
> The time a piece of hardware is _most_ likely to fail
is during
>the power-up or power-down process. If you'd any serious
experience
>supporting large numbers of computers, you'd know this.
>
> Further, intelligent enterprises running large scale
networks
>insist upon the computers being left on at night, so that
virus scans,
>application and patch installation via SMS, backups,
etc., can be
>scheduled and accomplished without affecting worker
productivity.
>
> The savings in electricity costs generated by
powering off the PCs
>prove miniscule compared to the costs of otherwise
unnecessary repairs
>and the lost productivity caused by scheduling/performing
virus scans,
>application and patch installation via SMS, backups,
etc., during
>business hours.
>
>Bruce Chambers
>--
Can you say "specious"? The fact that most failures occur
during the power-up process doesn't mean that failure will
never happen otherwise, or that the power-up process, per
se, directly contributes to failure. There is no reliable
*empirical* data in existence that I know of to support
your contention. If you know of some, please provide
references. And make sure that you understand that
empirical data does not consist in quoting someone else's
unsupported assertions.
As an aside, distribution of patches and virus updates
across large networks is often done at boot time, and if
it's not, the installation ususally requires a reboot, so
lost productivity is not an issue. Of course, if you had
both a brain and experience, you'd know that.
|
| Wed Jun 16, 2004 9:24 am |
|
 |
Unknown
Joined: 14 Apr 2007
Posts: 149
|
 Which is better? Leave computer on all day or start up sev..
On the contrary. I am not talking about the host system in a corporation. I am
talking about the hundreds of PC terminals in all the offices. As Rick below
mentions, the user logs off and after logging off he powers off his system
(PC).
Bruce Chambers" <bchambers.TakeThisOut@nospamcableone.net> wrote in message
news:ORa4Xe0UEHA.4088@TK2MSFTNGP09.phx.gbl...
> Greetings --
>
> That's utter nonsense. You've absolutely no real experience
> supporting computers in a large business or government environment,
> have you? Wanna bet?
> The time a piece of hardware is _most_ likely to fail is during
> the power-up or power-down process. If you'd any serious experience
> supporting large numbers of computers, you'd know this.
> The most like time to fail in this mode is early life failures And they
will fail whether powering on and off or not.
Systems are tested for power on off cycle reliability.
> Further, intelligent enterprises running large scale networks
> insist upon the computers being left on at night, so that virus scans,
> application and patch installation via SMS, backups, etc., can be
> scheduled and accomplished without affecting worker productivity.
> I agree 100%--- But not the hundreds of PC terminals on a LAN.
> The savings in electricity costs generated by powering off the PCs
> prove miniscule compared to the costs of otherwise unnecessary repairs
> and the lost productivity caused by scheduling/performing virus scans,
> application and patch installation via SMS, backups, etc., during
> business hours. That's for the host system.
>
> Bruce Chambers
> --
> Help us help you:
> http://dts-l.org/goodpost.htm
> http://www.catb.org/~esr/faqs/smart-questions.html
>
> You can have peace. Or you can have freedom. Don't ever count on
> having both at once. - RAH
>
>
> "Unknown" <Unknown.TakeThisOut@Somewhere.Kom> wrote in message
> news:XZDzc.24553$eH1.11221391@newssvr28.news.prodigy.com...
> > Reputable manufacturers do extensive tests to insure their products
> meet life
> > expectancies. It does no harm whatsoever to power on and off. As a
> matter of
> > fact in large corporations users are required to power their systems
> off each
> > and every time they leave their office. ( Even for lunch) It saves
> the
> > corporations thousands of dollars yearly in electrical bills.
>
>
|
| Wed Jun 16, 2004 3:21 pm |
|
 |
Unknown
Joined: 14 Apr 2007
Posts: 149
|
 Which is better? Leave computer on all day or start up sev..
On the contrary. I am not talking about the host system in a corporation. I am
talking about the hundreds of PC terminals in all the offices. As Rick below
mentions, the user logs off and after logging off he powers off his system
(PC).
Bruce Chambers" <bchambers DeleteThis @nospamcableone.net> wrote in message
news:ORa4Xe0UEHA.4088@TK2MSFTNGP09.phx.gbl...
> Greetings --
>
> That's utter nonsense. You've absolutely no real experience
> supporting computers in a large business or government environment,
> have you? Wanna bet?
> The time a piece of hardware is _most_ likely to fail is during
> the power-up or power-down process. If you'd any serious experience
> supporting large numbers of computers, you'd know this.
> The most like time to fail in this mode is early life failures And they
will fail whether powering on and off or not.
Systems are tested for power on off cycle reliability.
> Further, intelligent enterprises running large scale networks
> insist upon the computers being left on at night, so that virus scans,
> application and patch installation via SMS, backups, etc., can be
> scheduled and accomplished without affecting worker productivity.
> I agree 100%--- But not the hundreds of PC terminals on a LAN.
> The savings in electricity costs generated by powering off the PCs
> prove miniscule compared to the costs of otherwise unnecessary repairs
> and the lost productivity caused by scheduling/performing virus scans,
> application and patch installation via SMS, backups, etc., during
> business hours. That's for the host system.
>
> Bruce Chambers
> --
> Help us help you:
> http://dts-l.org/goodpost.htm
> http://www.catb.org/~esr/faqs/smart-questions.html
>
> You can have peace. Or you can have freedom. Don't ever count on
> having both at once. - RAH
>
>
> "Unknown" <Unknown DeleteThis @Somewhere.Kom> wrote in message
> news:XZDzc.24553$eH1.11221391@newssvr28.news.prodigy.com...
> > Reputable manufacturers do extensive tests to insure their products
> meet life
> > expectancies. It does no harm whatsoever to power on and off. As a
> matter of
> > fact in large corporations users are required to power their systems
> off each
> > and every time they leave their office. ( Even for lunch) It saves
> the
> > corporations thousands of dollars yearly in electrical bills.
>
>
|
| Wed Jun 16, 2004 3:21 pm |
|
 |
Unknown
Joined: 14 Apr 2007
Posts: 149
|
 Which is better? Leave computer on all day or start up sev..
You are correct when you state the most likely time a motor will fail.
However, you fail to mention that when a hard disk is not used for a period of
time the motor is shut down. This is also true especially on CD drive motors.
Therefore, the motors are shut down and powered up a lot more often than you
think. Leave your system idle for a while and then when you go back you'll see
that the HD motor MUST be powered on.
"Ron Martell" <ron.TakeThisOut@onlinehelp.bc.ca> wrote in message
news:iudvc0p6fc1ndt3kvfp3sgprl9nsgojn8j@4ax.com...
> "BarbaraMN" <NOschissel.TakeThisOut@SPAMattNO.net> wrote:
>
> >Running windows XP at home, using dial-up, virus check and firewall
> >
> >Recently switched to XP from W98 where I left the computer on all day, with
> >a screensaver running all day. This new computer I have been turning off
> >and on several times a day and not running a screensaver. Is all that off
&
> >on switching going to cause a problem? Thanks
> >
>
> Turning a computer on and off multiple times a day is pretty much the
> worst thing you can do.
>
> Two main reasons:
>
> 1. The microchips and the circuit boards inside a computer are
> composed of multiple layers of different types of materials. When
> power is applied these components heat up and when the power is shut
> off they cool down. All materials expand when they are heated and
> contract when they cool down. And different materisls expand and
> contract at different rates. This repeated expansion and contraction
> will cause stresses at the points where these materials join because
> they are expanding and contracting by different amounts. Repeated
> stressing will eventually cause the equivalent of metal fatigue in
> these materials resulting in failure of the join.
>
> 2. The hard drive in a computer is powered by an electric motor. All
> electric motors are under the greatest loads and stresses when they
> are first powered up, and that is when they are most likely to fail.
> How often have you seen an electric motor fail while it was running at
> normal speed? It does happen, but far more likely is that the
> electric motor (washing machine, refrigerator, starter motor in your
> car, whatever) will fail when it is turned on and power first begins
> to flow. The more often an electric motor is powered on and off the
> more likelihood there is of a failure during startup.
>
> My basic motto is either "on and off once a day" or "leave running
> 24/7" - the pros and cons of each are pretty much equal.
>
> Good luck
>
>
> Ron Martell Duncan B.C. Canada
> --
> Microsoft MVP
> On-Line Help Computer Service
> http://onlinehelp.bc.ca
>
> "The reason computer chips are so small is computers don't eat much."
|
| Wed Jun 16, 2004 3:29 pm |
|
 |
Unknown
Joined: 14 Apr 2007
Posts: 149
|
 Which is better? Leave computer on all day or start up sev..
You are correct when you state the most likely time a motor will fail.
However, you fail to mention that when a hard disk is not used for a period of
time the motor is shut down. This is also true especially on CD drive motors.
Therefore, the motors are shut down and powered up a lot more often than you
think. Leave your system idle for a while and then when you go back you'll see
that the HD motor MUST be powered on.
"Ron Martell" <ron.TakeThisOut@onlinehelp.bc.ca> wrote in message
news:iudvc0p6fc1ndt3kvfp3sgprl9nsgojn8j@4ax.com...
> "BarbaraMN" <NOschissel.TakeThisOut@SPAMattNO.net> wrote:
>
> >Running windows XP at home, using dial-up, virus check and firewall
> >
> >Recently switched to XP from W98 where I left the computer on all day, with
> >a screensaver running all day. This new computer I have been turning off
> >and on several times a day and not running a screensaver. Is all that off
&
> >on switching going to cause a problem? Thanks
> >
>
> Turning a computer on and off multiple times a day is pretty much the
> worst thing you can do.
>
> Two main reasons:
>
> 1. The microchips and the circuit boards inside a computer are
> composed of multiple layers of different types of materials. When
> power is applied these components heat up and when the power is shut
> off they cool down. All materials expand when they are heated and
> contract when they cool down. And different materisls expand and
> contract at different rates. This repeated expansion and contraction
> will cause stresses at the points where these materials join because
> they are expanding and contracting by different amounts. Repeated
> stressing will eventually cause the equivalent of metal fatigue in
> these materials resulting in failure of the join.
>
> 2. The hard drive in a computer is powered by an electric motor. All
> electric motors are under the greatest loads and stresses when they
> are first powered up, and that is when they are most likely to fail.
> How often have you seen an electric motor fail while it was running at
> normal speed? It does happen, but far more likely is that the
> electric motor (washing machine, refrigerator, starter motor in your
> car, whatever) will fail when it is turned on and power first begins
> to flow. The more often an electric motor is powered on and off the
> more likelihood there is of a failure during startup.
>
> My basic motto is either "on and off once a day" or "leave running
> 24/7" - the pros and cons of each are pretty much equal.
>
> Good luck
>
>
> Ron Martell Duncan B.C. Canada
> --
> Microsoft MVP
> On-Line Help Computer Service
> http://onlinehelp.bc.ca
>
> "The reason computer chips are so small is computers don't eat much."
|
| Wed Jun 16, 2004 3:29 pm |
|
 |
Ron Martell
Joined: 29 May 2007
Posts: 135
|
 Which is better? Leave computer on all day or start up sev..
"Unknown" <Unknown.DeleteThis@Somewhere.Kom> wrote:
>You are correct when you state the most likely time a motor will fail.
>However, you fail to mention that when a hard disk is not used for a period of
>time the motor is shut down. This is also true especially on CD drive motors.
>Therefore, the motors are shut down and powered up a lot more often than you
>think. Leave your system idle for a while and then when you go back you'll see
>that the HD motor MUST be powered on.
You can configure the power management so that the hard drive does not
power down.
CD drives are variable speed so are constantly speeding up or slowing
down while in use. They maintain a constant linear velocity of the
data track past the read head which means the drive spins faster when
reading from the inner portions of the CD and slows down as the head
moves toward the outer edge.
Ron Martell Duncan B.C. Canada
--
Microsoft MVP
On-Line Help Computer Service
http://onlinehelp.bc.ca
"The reason computer chips are so small is computers don't eat much."
|
| Fri Jun 18, 2004 9:26 pm |
|
 |
Ron Martell
Joined: 29 May 2007
Posts: 135
|
 Which is better? Leave computer on all day or start up sev..
"Unknown" <Unknown DeleteThis @Somewhere.Kom> wrote:
>You are correct when you state the most likely time a motor will fail.
>However, you fail to mention that when a hard disk is not used for a period of
>time the motor is shut down. This is also true especially on CD drive motors.
>Therefore, the motors are shut down and powered up a lot more often than you
>think. Leave your system idle for a while and then when you go back you'll see
>that the HD motor MUST be powered on.
You can configure the power management so that the hard drive does not
power down.
CD drives are variable speed so are constantly speeding up or slowing
down while in use. They maintain a constant linear velocity of the
data track past the read head which means the drive spins faster when
reading from the inner portions of the CD and slows down as the head
moves toward the outer edge.
Ron Martell Duncan B.C. Canada
--
Microsoft MVP
On-Line Help Computer Service
http://onlinehelp.bc.ca
"The reason computer chips are so small is computers don't eat much."
|
| Fri Jun 18, 2004 9:26 pm |
|
 |
cathyandgeoge
Joined: 06 May 2007
Posts: 2
|
 Which is better? Leave computer on all day or start up sev..
All I want to know is what is better for my computer, to shut it down at
night, or leave it running 24/7 ( a techition told me to leave it on so the
schecualed tasks can do their jobs ) or turn it off so it cleans it's self
when it starts up ( thats what another person told me ) can anyone help? I'm
very confused.
"Ron Martell" wrote:
> "BarbaraMN" <NOschissel.RemoveThis@SPAMattNO.net> wrote:
>
> >Running windows XP at home, using dial-up, virus check and firewall
> >
> >Recently switched to XP from W98 where I left the computer on all day, with
> >a screensaver running all day. This new computer I have been turning off
> >and on several times a day and not running a screensaver. Is all that off &
> >on switching going to cause a problem? Thanks
> >
>
> Turning a computer on and off multiple times a day is pretty much the
> worst thing you can do.
>
> Two main reasons:
>
> 1. The microchips and the circuit boards inside a computer are
> composed of multiple layers of different types of materials. When
> power is applied these components heat up and when the power is shut
> off they cool down. All materials expand when they are heated and
> contract when they cool down. And different materisls expand and
> contract at different rates. This repeated expansion and contraction
> will cause stresses at the points where these materials join because
> they are expanding and contracting by different amounts. Repeated
> stressing will eventually cause the equivalent of metal fatigue in
> these materials resulting in failure of the join.
>
> 2. The hard drive in a computer is powered by an electric motor. All
> electric motors are under the greatest loads and stresses when they
> are first powered up, and that is when they are most likely to fail.
> How often have you seen an electric motor fail while it was running at
> normal speed? It does happen, but far more likely is that the
> electric motor (washing machine, refrigerator, starter motor in your
> car, whatever) will fail when it is turned on and power first begins
> to flow. The more often an electric motor is powered on and off the
> more likelihood there is of a failure during startup.
>
> My basic motto is either "on and off once a day" or "leave running
> 24/7" - the pros and cons of each are pretty much equal.
>
> Good luck
>
>
> Ron Martell Duncan B.C. Canada
> --
> Microsoft MVP
> On-Line Help Computer Service
> http://onlinehelp.bc.ca
>
> "The reason computer chips are so small is computers don't eat much."
>
|
| Sun Sep 26, 2004 12:24 pm |
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cathyandgeoge
Joined: 06 May 2007
Posts: 2
|
 Which is better? Leave computer on all day or start up sev..
All I want to know is what is better for my computer, to shut it down at
night, or leave it running 24/7 ( a techition told me to leave it on so the
schecualed tasks can do their jobs ) or turn it off so it cleans it's self
when it starts up ( thats what another person told me ) can anyone help? I'm
very confused.
"Ron Martell" wrote:
> "BarbaraMN" <NOschissel.RemoveThis@SPAMattNO.net> wrote:
>
> >Running windows XP at home, using dial-up, virus check and firewall
> >
> >Recently switched to XP from W98 where I left the computer on all day, with
> >a screensaver running all day. This new computer I have been turning off
> >and on several times a day and not running a screensaver. Is all that off &
> >on switching going to cause a problem? Thanks
> >
>
> Turning a computer on and off multiple times a day is pretty much the
> worst thing you can do.
>
> Two main reasons:
>
> 1. The microchips and the circuit boards inside a computer are
> composed of multiple layers of different types of materials. When
> power is applied these components heat up and when the power is shut
> off they cool down. All materials expand when they are heated and
> contract when they cool down. And different materisls expand and
> contract at different rates. This repeated expansion and contraction
> will cause stresses at the points where these materials join because
> they are expanding and contracting by different amounts. Repeated
> stressing will eventually cause the equivalent of metal fatigue in
> these materials resulting in failure of the join.
>
> 2. The hard drive in a computer is powered by an electric motor. All
> electric motors are under the greatest loads and stresses when they
> are first powered up, and that is when they are most likely to fail.
> How often have you seen an electric motor fail while it was running at
> normal speed? It does happen, but far more likely is that the
> electric motor (washing machine, refrigerator, starter motor in your
> car, whatever) will fail when it is turned on and power first begins
> to flow. The more often an electric motor is powered on and off the
> more likelihood there is of a failure during startup.
>
> My basic motto is either "on and off once a day" or "leave running
> 24/7" - the pros and cons of each are pretty much equal.
>
> Good luck
>
>
> Ron Martell Duncan B.C. Canada
> --
> Microsoft MVP
> On-Line Help Computer Service
> http://onlinehelp.bc.ca
>
> "The reason computer chips are so small is computers don't eat much."
>
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| Sun Sep 26, 2004 12:24 pm |
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