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How dangerous is overvolting Llano CPUs? Is it just heat thats the issue?

post #1 of 5
Thread Starter 
Ok so i have a AMD A8 3870k and was wondering just how far i can safely push my chips Vcore. I found that if i raised it to a wopping 1.5v or 1.6v i could get up to 3.6 maby 3.7 stable without and issues with heat. I have heard about electromigration but within a 6 months maby a year or two would it still run? Also has anyone here ever killed their cpu with overvolting while running at a low tempature? I would be happy to hear whatever anyone has to say on this topic.
post #2 of 5
I wouldn't give the voltage too much of a push. Heat isn't the only danger when it comes to overvolting, you can seriously damage the CPU by giving it too much voltage. Do not go much further up... especially with an APU processor...
post #3 of 5
Quote:
Originally Posted by danielfnj96 View Post

Ok so i have a AMD A8 3870k and was wondering just how far i can safely push my chips Vcore. I found that if i raised it to a wopping 1.5v or 1.6v i could get up to 3.6 maby 3.7 stable without and issues with heat. I have heard about electromigration but within a 6 months maby a year or two would it still run? Also has anyone here ever killed their cpu with overvolting while running at a low tempature? I would be happy to hear whatever anyone has to say on this topic.

1.6v is WAY too much voltage to put into it on a modern process node unless you are going for a suicide run. But yes in 6 months it will still run. It will just be having greatly diminished life and I wouldnt be surprised if it started giving errors and not being able to run as fast in 2-3 years.

but yes, people have killed their CPUs with too much voltage regardless of temperature.
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post #4 of 5
Llano was 32nm, was it not? AMD mentioned with the Phenom II's (45nm) 1.55v was the most they'd recommend for vcore. I've seen some documentation for BD and PD that indicate the same thing actually. I wouldn't go over that, not unless you're ok with the fact that your CPU might not last as long as you want it to.

I've only heard of a few fried CPU's from electron migration, but each one of those that did was using too much voltage. I think about the fastest I've seen a chip die was a year or so (was an old windsor/brisbane chip on 1.65- 1.7v). I've also seen chips that have started to show signs of electron migration (no longer holding the OC with the same voltage, meaning, it required more and more voltage to keep the same speed). Most of those cases have ended with people upgrading the CPU before it technically died, but I think it still counts.

Killing a processor has nothing to do with temperature, and everything to voltage. Extreme overclocking is done with liquid nitrogen and helium (-250c) and extreme voltage (1.8-1.9v). Extreme overclockers also regularly kill chips. Clearly it is not temperatures that are destroying the CPU, but it is instead voltage.

And yea, I'd be suspect about your temp readings being inaccurate.

Good luck on the OC though smile.gif.
post #5 of 5
Don't try to push it any further. The Llano APU's had various manufacturing issues and was apparently rushed out a bit a few years ago. These chips all usually top out at around 3.5 or 3.6 GHz. As has been mentioned, 1.6 is too much. Drop the voltage down and stick with 3.5 or 3.6 GHz, as you won't get any higher than that without messing with the FSB speed.
Edited by NaroonGTX - 8/14/13 at 11:48pm
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