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Hit 5.2GHz with the 8120, Now For Stability! - Page 2

post #11 of 17
1.6 with a chilled bucket loop really isn't that big of a deal for a little fun from time to time. I think people are overreacting just a bit.
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post #12 of 17
Mother of god...

1.6v on a 32nm CPU? That's nuts. Congrats on the OC, hope that poor chip lives to fight another day as well, with voltage like that it could go at any time. 1.6v is high for a 65 nm CPU...let alone a 32nm one.
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post #13 of 17
Quote:
Originally Posted by 2advanced View Post

Would electromigration occur immediately?

The higher the voltage (and/or temperature), the more quickly it will accumulate damage. The rate of damage increases beyond linearity, however, so once you start flirting with high voltages it's easy to go from reasonable to unreasonable without knowing when you've crossed the line. It doesn't help that it's less a line to cross than a blurry abstract guess.

According to the last bit of information I've seen on the subject (pretty old), CPUs are (were?) engineered to last at least ten years. In reality, that might mean 20+ years of actual use since the ratings are done by engineers and are thus conservative. At 1.6V+ under water, I doubt you'll have a chip that will last a year without significant incident. Even 1.5V nominal like I run (spikes higher during load) is bordering on irresponsible for 32nm.
post #14 of 17
Thread Starter 
Quote:
Originally Posted by konspiracy View Post

Can you do something for me?
Set your cpu to like 4ghz and set the cpu vcore to auto and what does your vcore reading in the bios say?

Vcore in the bios says 1.344V

Thanks for the words guys. I only ran it at that speed for about 5 minutes. The temperatures never went above 41°C. Probably because there was no real load. At 1.55V Im stable to about 4.8GHz with temps at 48° peak after 10min of prime blend. I guess ill have to be happy about that.

Its fun seeing those speeds within windows though.
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post #15 of 17
Quote:
Originally Posted by 2advanced View Post

Vcore in the bios says 1.344V
Thanks for the words guys. I only ran it at that speed for about 5 minutes. The temperatures never went above 41°C. Probably because there was no real load. At 1.55V Im stable to about 4.8GHz with temps at 48° peak after 10min of prime blend. I guess ill have to be happy about that.
Its fun seeing those speeds within windows though.

1.55v is pretty extreme for a 32nm chip especially for a 24/7 voltage.. even 1.5v is on the borderline edge for 24/7, even if you can control the heat.. hell, 1.55v on 45nm chips was pretty much the max for 24/7 and most people run at 1.5v or less 24/7 on 45nm tech so you don't want to do that with 32nm chips..

I saw this one guy that had a 3960X (32nm tech) and he "auto oc'd" it via the bios option to 5GHz. It ramped his voltage up to 1.6v and his chip lasted just over a month before he was posting on these forums wondering what happened.

Be safe, and don't go any higher than 1.5v load voltage on your chip. (even that is pretty high, but probably the max you should ever go for a 24/7 on 32nm) Most people suggest 1.4v - 1.45v max for 32nm.
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post #16 of 17
Thread Starter 
Quote:
Originally Posted by iinversion View Post

Be safe, and don't go any higher than 1.5v load voltage on your chip. (even that is pretty high, but probably the max you should ever go for a 24/7 on 32nm) Most people suggest 1.4v - 1.45v max for 32nm.

I thought the consensus was that 1.55V was the max for BullDozer and 24/7 use?
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post #17 of 17
Quote:
Originally Posted by 2advanced View Post

I thought the consensus was that 1.55V was the max for BullDozer and 24/7 use?

What? Where did you hear this? The consensus is 1.4v - 1.45v max for 24/7. It is 32nm tech not 45nm.

Even for Phenom II, 1.55v 24/7 is the absolute max and usually not suggested unless under water and the longevity of the chip wasn't of concern. 1.5v 24/7 was usually the max norm on Phenom II and those chips are 45nm, so how would a 32nm chip have a higher max voltage? AMD has the max voltage listed at like 1.41v or something of that sort for the FX chips.

Seriously, I wouldn't do 24/7 higher than 1.45v.
Quote:
Originally Posted by Sin0822 
#1 CPU VCore: Stock varies, but safe on air up to 1.45-1.5v or 55C, whichever comes first. For 24/7 keep it under 1.4v or 45C, whichever comes first. That is my recommendation to avoid electron migration and voltage/heat degradation.

Edited by iinversion - 4/9/12 at 10:45pm
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