How long before a CPU is damaged?

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blizzars

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Dec 17, 2013
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I began overclocking my 6700K on an Asus z170a last night, running rog realbench to stress test. I was crashing when I was trying 4.8@1.45V (tried multiple times).

Now after doing some reading today, I realized a few things:
a) I forgot to set the LLC, it was set to auto this whole time.
b) I was viewing the from voltage readings, I was looking at VID and not the actual vcore, meaning with LLC on auto, it might have applied way more voltage than 1.45 (maybe even >1.6? hopefully not), temps were max 86-88C.

My question is does a short exposure of high voltage affect the lifespan/quality of the CPU? Like I said I ran the stress test multiple times and it crashed everytime, but I did not leave it on for a long time, maybe longest being ~10-15 mins.
 
Solution
ajpaolello
As Eximo said, without very extensive testing, we won't have a solid answer for you as to what is damaged, how long thew CPU has in it, etc. You can keep pushing for yourself to see if it can overclock as well still, obviously you know what you're getting yourself into here, but from the data you've given us, it would be hard to draw a solid conclusion.
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Eximo

Eximo

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No real answer here. If the CPU is still working, it is still working. When it is no longer stable at any voltage or doesn't work at all then it could be said to be broken. This can happen in two weeks or ten years.

Pretty much only scientific testing could reveal potential damage. I suppose a test of the power the chip draws at a given voltage (though you would have needed a baseline from when the chip was new) could reveal something. Beyond that it would take an electron microscope, which would probably damage it, to see the effects of over current or over voltage.
 
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blizzars

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I ran about a total of.. 6-8 stress tests with varying voltages. the max I tried was 1.45 and the average I tried was around 1.38. I guess without actually knowing how LLC on auto affected the voltage, I won't know if it applied way more voltage than it should/is recommended. Everything is working still, I was just wondering if it may have reduced my ability to overclock as well as it could have even tho a high voltage was applied for a total of roughly 30 mins.

 
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ajpaolello

ajpaolello

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As Eximo said, without very extensive testing, we won't have a solid answer for you as to what is damaged, how long thew CPU has in it, etc. You can keep pushing for yourself to see if it can overclock as well still, obviously you know what you're getting yourself into here, but from the data you've given us, it would be hard to draw a solid conclusion.
 
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blizzars

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Ahh alright. I guess I was just worried that having LLC on auto may have applied a really high voltage than what I specified due to vboost. I'm pretty sure it wouldn't have applied +0.5V though.
 
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blizzars

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I've just seen extreme cases of LLC applying an extra 0.1V, meaning I would have applied ~1.55-1.6V to my cpu, even if it wasn't prolonged
 
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