- Joined
- Feb 18, 2002
TC wrote on 04-16-04 11:45 PM:
Yes voltage - electrical components are rated for a specified range of voltage, amperage, and temperature. Exceed any one of those for long enough and you will destroy the component(s). I don't know why someone would say that as long as you keep a cpu cool nothing else matters.
The below listed conclusions were made for as much as a 50% increase in Vcore voltage.
It was said that CPU weak spots not discovered during manufacturing stress tests may lead to permanent failure sooner than average, not the fact that you’re running too much voltage through your adequately cooled system. If this is not true, conclusion number 4. below needs to be changed.
1. Increase of 60 MHz at the expense of increasing 0.2 volts is not recommended.
2. Assuming expected CPU life time is 10 years, 30% overvolt statistically reduces it to six years.
3. 30% overvolt for DLT3C's is 1.95 volts and for Bartons and DUT3C T-Breds, about 2.1 volts. (Remember to keep the on die CPU temperature under 65 C.)
4. Highest attainable stable Overclock cannot be reduced within months provided on die CPU temperature is kept under 65 C, however:
5. CPU weak spots not discovered during manufacturing stress tests may lead to permanent failure sooner than average:
hitechjb1 said:A 10% increase in Vcore, would shorten the failure time to 83% of nominal failure time.
A 20% increase in Vcore, would shorten the failure time to 69% of nominal failure time.
A 30% increase in Vcore, would shorten the failure time to 59% of nominal failure time.
A 50% increase in Vcore, would shorten the failure time to 44% of nominal failure time.
Nominal failure time is assumed to be 10 years at default voltage.
hitechjb1 said:These are the links to the posts discussing the effect of voltage, temperature, .... on CPU due to electromigration, ....
Effect of high Vcore and electromigration on CPU failure time (page 15)
Effect of high Vcore and electromigration on expected failure time for Tbred B/Barton (page 15)
What could damage a chip/CPU permanently? (page 15)
They have to be looked at in detailed technical context.
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