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CPU degredation, what exactly happens? - Page 3

post #21 of 24
I just think about TDP and output, and how these chips don't protect themselves until they reach ~100C or TjMax. And if that's around the 70C maximum recommendation for the TCase reading (who knows) then it should mean that with everyday temps that match stock temps there should be tolerance enough not to worry, considering the chips should be able to run stock in warm climates for years.

As for higher volts, my VID climbs 0.04v up to 85C during simulated fan failure. So maybe there's tolerance there with better binned processors, where crappy high VID, hot chips would set a ceiling for the those of us with better, low VID's (again taking advantage of better conditions).

And the only time I've seen degradation in a chip was with a Barton mobile that had 2.0v for three years, with an original Zalman cooler.
Edited by samwiches - 4/21/12 at 3:56am
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post #22 of 24
Quote:
Originally Posted by GeneO View Post

Degradation from electormigration always occurs at any voltage or temperature. It just occurs more rapidly at higher temperatures or voltages. The processors are designed such that if they are kept within their specified operating voltages and temperatures, the processor will last for its specified lifetime without issues.

Makes sense, I was taught that particles always collide no matter what the temp (Except absolute 0). essentially the harder the electrons hit the faster it degrades, and the only way to stop the CPU from degrading is to turn it off.
post #23 of 24
Quote:
Originally Posted by srsparky32 View Post

I'm sure you just got all of that from wikipedia and google. if it happened at 1.6GHz and 0.9v then i guess my 990X is degrading right as we speak. the only way electron migration occurs is if the voltage is too high and the temperature is too high. you are deluded if you think it happens at a 1.6ghz/0.9v

Quote:
Originally Posted by GeneO View Post

I have a doctorate in physics, what's your excuse?

Yes your processor is degrading as we speak. So is mine. But it degrades at a slow enough rate that it can function properly for many years if you don't push it too far. It takes a lot of dislodged atoms to make the conductors (mostly at material junctions) loose their conductive path or for the conductive debris to short to adjacent components. It happens whenever there is a current flowing through your processor. It just happens at a low enough rate that your processor will last quite a long time before the damage is felt - as long as you keep the temperature and voltage low enough. The processors are designed with this in mind. However if you start running at higher voltages r temperatures that are out of spec, you accelerate this process and reduce the lifetime of your processor below its designed lifetime.

Wikipedia probably has some good material on electromigration, you should read it instead of attempting to use it to taunt.

*revive old thread FTW*

As much as you two appear to be having a disagreement, I found this all very interesting reading material smile.gif

I believe GeneO is correct, logically any electronic equipment (or mechanical, or organic etc.) will degrade over time. Will your CPU still be working at 100% in 50yrs time? No, it will do the same thing your body will do in that time: degrade (as depressing as that is). I searched for a thread about degradation as I was thinking of overclocking my 3770K after my previous computer had some issues. The MacBook Pro I'm typing on is an example of CPU degradation, after 3yrs of intense animation and VFX rendering, it has noticeably slowed (although this may also be down to other factors too). It has not been overclocked obviously but I did maybe push it a tad too far without looking after it properly.

Overclocking will shorten your computers life-span, but probably only by any noticeable length of time if you intend to push the chip to 100% on a frequent basis. If you overclock and then just web-browse at idle clock speed/voltage then it will last just as long as if you'd never touched it.
    
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post #24 of 24
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