CPU death by electromigration...

In article <XnsABE0C08017FC1idtokenpost@144.76.35.198>,
Steve Wilson <no@spam.com> wrote:
I\'ve been sitting here watching my CPU die. It\'s a bit like Alzheimers in
humans. First you lose function x, then y, and so on.

It\'s interesting that whole functions disappear, and not just portions.

Eventually, everything will die from electromigraation.

The industry expects a CPU to last 7 years. That\'s about the age of my CPU.

Then where do people get lifetimes of 20 or 30 years for their prducts?
Click to expand...

I have an Intel Plato board with a Pentium 90 that was exchanged
when the famous fp bug was found. It worked until quite recent
and I stopped using it because of hard disk failure, not something
with the board. That certainly is more than 20 years.

Groetjes Albert
--
This is the first day of the end of your life.
It may not kill you, but it does make your weaker.
If you can\'t beat them, too bad.
albert@spe&ar&c.xs4all.nl &=n http://home.hccnet.nl/a.w.m.van.der.horst
 
On 15/11/2020 11:23, albert wrote:
In article <XnsABE0C08017FC1idtokenpost@144.76.35.198>,
Steve Wilson <no@spam.com> wrote:
I\'ve been sitting here watching my CPU die. It\'s a bit like Alzheimers in
humans. First you lose function x, then y, and so on.

It\'s interesting that whole functions disappear, and not just portions.

Eventually, everything will die from electromigraation.

The industry expects a CPU to last 7 years. That\'s about the age of my CPU.

Then where do people get lifetimes of 20 or 30 years for their prducts?

I have an Intel Plato board with a Pentium 90 that was exchanged
when the famous fp bug was found. It worked until quite recent
and I stopped using it because of hard disk failure, not something
with the board. That certainly is more than 20 years.
Click to expand...

I expect it depends on how hard it is worked and how hot the chip die
gets in regular use. Some CPUs run *much* hotter than others.

My instinct would be that the faster Pentium III\'s would be vulnerable
since some of them ran insanely hot in laptops. Hot enough to cause
injury to the user if they were daft enough to use it on their lap.

Mine actually damaged the finish on a varnished table.

Since that era TDP has decreased as finer feature resolution and lower
voltages became possible and heatsinks have also improved quite a bit.

--
Regards,
Martin Brown
 
søndag den 15. november 2020 kl. 12.33.43 UTC+1 skrev Martin Brown:
On 15/11/2020 11:23, albert wrote:
In article <XnsABE0C08017...@144.76.35.198>,
Steve Wilson <n...@spam.com> wrote:
I\'ve been sitting here watching my CPU die. It\'s a bit like Alzheimers in
humans. First you lose function x, then y, and so on.

It\'s interesting that whole functions disappear, and not just portions..

Eventually, everything will die from electromigraation.

The industry expects a CPU to last 7 years. That\'s about the age of my CPU.

Then where do people get lifetimes of 20 or 30 years for their prducts?

I have an Intel Plato board with a Pentium 90 that was exchanged
when the famous fp bug was found. It worked until quite recent
and I stopped using it because of hard disk failure, not something
with the board. That certainly is more than 20 years.
I expect it depends on how hard it is worked and how hot the chip die
gets in regular use. Some CPUs run *much* hotter than others.

My instinct would be that the faster Pentium III\'s would be vulnerable
since some of them ran insanely hot in laptops. Hot enough to cause
injury to the user if they were daft enough to use it on their lap.

Mine actually damaged the finish on a varnished table.

Since that era TDP has decreased as finer feature resolution and lower
voltages became possible and heatsinks have also improved quite a bit.
Click to expand...

and the system much smarter preventing the cpu from getting as hot
by throttling the clock speeds and adjusting the voltages
 
On 11/15/2020 4:23 AM, albert wrote:
In article <XnsABE0C08017FC1idtokenpost@144.76.35.198>,
Steve Wilson <no@spam.com> wrote:
I\'ve been sitting here watching my CPU die. It\'s a bit like Alzheimers in
humans. First you lose function x, then y, and so on.

It\'s interesting that whole functions disappear, and not just portions.

Eventually, everything will die from electromigraation.

The industry expects a CPU to last 7 years. That\'s about the age of my CPU.

Then where do people get lifetimes of 20 or 30 years for their prducts?

I have an Intel Plato board with a Pentium 90 that was exchanged
when the famous fp bug was found. It worked until quite recent
and I stopped using it because of hard disk failure, not something
with the board. That certainly is more than 20 years.
Click to expand...

I keep a Compaq Portable 386
<https://en.wikipedia.org/wiki/Compaq_Portable_386> for it\'s two ISA slots and
\"legacy\" applications (that require ISA hardware or 5\" floppies).

But, it sits in a closet 99.97226% of the time...
 
On 2020/06/18 3:55 p.m., Steve Wilson wrote:
I\'ve been sitting here watching my CPU die. It\'s a bit like Alzheimers in
humans. First you lose function x, then y, and so on.

It\'s interesting that whole functions disappear, and not just portions.

Eventually, everything will die from electromigraation.

The industry expects a CPU to last 7 years. That\'s about the age of my CPU.

Then where do people get lifetimes of 20 or 30 years for their prducts?
Click to expand...

Lots of arcade games from the 70s use 8-bit CPUs and most are still
running. So that is 45 years or so. Not so bad!

However it is getting more common to try replacing the CPU when things
go weird.

John :-#)#

--
(Please post followups or tech inquiries to the USENET newsgroup)
John\'s Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
\"Old pinballers never die, they just flip out.\"
 
In article <rorvmd$5do$1@dont-email.me>,
Don Y <blockedofcourse@foo.invalid> wrote:
On 11/15/2020 4:23 AM, albert wrote:
In article <XnsABE0C08017FC1idtokenpost@144.76.35.198>,
Steve Wilson <no@spam.com> wrote:
I\'ve been sitting here watching my CPU die. It\'s a bit like Alzheimers in
humans. First you lose function x, then y, and so on.

It\'s interesting that whole functions disappear, and not just portions.

Eventually, everything will die from electromigraation.

The industry expects a CPU to last 7 years. That\'s about the age of my CPU.

Then where do people get lifetimes of 20 or 30 years for their prducts?

I have an Intel Plato board with a Pentium 90 that was exchanged
when the famous fp bug was found. It worked until quite recent
and I stopped using it because of hard disk failure, not something
with the board. That certainly is more than 20 years.

I keep a Compaq Portable 386
https://en.wikipedia.org/wiki/Compaq_Portable_386> for it\'s two ISA slots and
\"legacy\" applications (that require ISA hardware or 5\" floppies).

But, it sits in a closet 99.97226% of the time...
Click to expand...

Mine was running 24/7 for >20 years.

Groetjes Albert
--
This is the first day of the end of your life.
It may not kill you, but it does make your weaker.
If you can\'t beat them, too bad.
albert@spe&ar&c.xs4all.nl &=n http://home.hccnet.nl/a.w.m.van.der.horst
 
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