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post #11 of 28
5/28/12 at 12:48am
If you only expect the cpu to last 2-3years, then you could prob, go whit 1.7v if you manage to keep it decent cool. I have seen an formula witch supposedly makes it possible to calculate the lifespan of cpu after oc whit quite the accuracy. Im trying to find this formula, but i cant for the moment it seems,hehe. But as I remeber the heat is the real cpu killer, and even moderat heat takes it time to kill the cpu, not the voltage so mutch. But remeber that these monitor programs can give false readings..
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post #12 of 28
5/28/12 at 12:50am
Quote:
Originally Posted by ruarcs30 View Post

If you only expect the cpu to last 2-3years, then you could prob, go whit 1.7v if you manage to keep it decent cool. I have seen an formula witch supposedly makes it possible to calculate the lifespan of cpu after oc whit quite the accuracy. Im trying to find this formula, but i cant for the moment it seems,hehe. But as I remeber the heat is the real cpu killer, and even moderat heat takes it time to kill the cpu, not the voltage so mutch. But remeber that these monitor programs can give false readings..

1.7v? uhm what? Lol.

That kind of voltage will do much more damage than the heat will. Perhaps you have never heard of electromigration.

http://en.wikipedia.org/wiki/Electromigration
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post #13 of 28
5/28/12 at 1:11am
Quote:
Originally Posted by iinversion View Post

1.7v? uhm what? Lol.
That kind of voltage will do much more damage than the heat will. Perhaps you have never heard of electromigration.
http://en.wikipedia.org/wiki/Electromigration

I dissagree, that kind of voltage would produce quite mutch heat ofcourse, witch will make dammage, but if cooled it should not kill the cpu before running 2-3 years. Good luck keeping it cool tough, hehe. Thats at least what the engeenire told me, I may be misstaken of course. Im trying to find the mailing I did whit him, if I can find it. I got to many diffrent mails
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post #14 of 28
5/28/12 at 1:17am
^ There is a reason 1.7v + is only used under DICE/LN2 and it's not because conventional water cooling would not be able to keep it cool enough.

Like I said before..

http://en.wikipedia.org/wiki/Electromigration
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post #15 of 28
5/28/12 at 7:45am
Lol, I may have missed the part that you must use ln2 etc perhaps.
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post #16 of 28
5/28/12 at 11:01pm
Umm, anyone ever heard of Phase Change cooling? You could definitely run 1.7v for 24/7 if you so wanted. But as noted, expect the chip to die within 1.5-3 years. Normal expected lifetime is 10+ years.
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post #17 of 28
5/30/12 at 2:51am
I talked to a friend of mine yeasterday, the one that got me interested in oc, and he got an athlon x4 witch he has runned on 1.66vcore for about 1 year now. The cpu still is going strong, but he only use it about 10/7 i thought. The only thing he had noticed was that he had to go down on the MHz alittle to keep it stable after some months whit that voltage. Its dying mutch slower than he was expecting,hehe
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post #18 of 28
5/30/12 at 10:31am
your friends Athlon chip is 45nm in size your FX is 32nm a smaller heat sink here is a link that will help in OC a FX chip

http://www.overclock.net/t/1140459/bulldozer-overclocking-guide-performance-scaling-charts-max-ocs-ln2-results-coming
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post #19 of 28
5/30/12 at 1:14pm
Phase change can help mitigate the damage of high vcore, mainly due to being able to go sub zero with a really good setup. Chip life is a function of temps and voltage.
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post #20 of 28
5/30/12 at 3:53pm
He's right Konspiracy...I emailed AMD and they said the same thing, that it's not something they release externally but internally the max recommended V is 1.4125V (at least that was for the 8120 that I asked about). I'm guessing that's they're playing it safe by making a scenario where everyone uses air cooling and that would be the limit they would want to see and so with better cooling the number will increase etc. if that makes any sense.

But here's my opinion, as long as your not exceeding the max TCase temperature AND you're not throwing a crazy voltage at the chip (like 1.65V unless your using extreme cooling) I'd say you should in theory be okay. On liquid cooling I still wouldn't go above 1.5V unless you really know what you're doing and are really trying to push your chip.
Edited by Bubba Hotepp - 5/30/12 at 3:57pm
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