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CPU degredation, what exactly happens?

post #1 of 24
Thread Starter 
So, as I have said in another thread, I've just OCed my 2600K to 4.6Ghz @ 1.375v. Ran Prime95 overnight and it all went fine.

Now, I've noticed through googling, that CPU degredation can occur at basically any voltage above stock, though every chip is different obviously.

1) If it does degrade, does that mean I can drop it back to stock and still use the chip?

2) Or does it mean that the chip will require mor voltage at any frequency and will continue to do so until it dies?

And 3) is 1.375v likely to cause any significant degredation over, say, a year or so?

Obviously I could lower the vCore, as I tried this speed at 1.35v and got BSOD so I upped it to the current voltage, so I do have some wiggle room. I just lack the time to run multiple 8 hour passes on Prime, so would be happy to leave it at this, IF its safe to do so.

My load temps got to 75 degrees on one core, 73 and lower on the others.
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post #2 of 24
My opinion is when it takes more voltage then it did before to be stable. As it might start getting blue screens and then you have to increase the voltage a little above what it was stable at before. Thanks
post #3 of 24
Thread Starter 
Quote:
Originally Posted by KILLER_K View Post

My opinion is when it takes more voltage then it did before to be stable. As it might start getting blue screens and then you have to increase the voltage a little above what it was stable at before. Thanks

Well, thats what I understood it to be, but was still unsure of where I can go from there.
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post #4 of 24
degradation is when it bluescreens and errors out at a confirmed stable overclock. your chip degrades every time you have it at a higher clock speed and at a higher voltage, but major degradation comes from electron migration, which is too high of a voltage at too high of a heat. obviously, you dont have this issue.
 
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post #5 of 24
Most of the time it happens because people put high voltage through the chip 24-7. I wouldn't do over 1.45 volts to be 24-7 stable. I most use voltages past that for ln2/dice/stage runs. As once they are done, they will sell off the chip looking for a better one. As they are pretty cheap now to begin with. Keep the voltage in check and keep the temps in check. Then it should last you a while then. But I see no reason to prime95 a chip to death either though. Thanks
post #6 of 24
Thread Starter 
Quote:
Originally Posted by srsparky32 View Post

degradation is when it bluescreens and errors out at a confirmed stable overclock. your chip degrades every time you have it at a higher clock speed and at a higher voltage, but major degradation comes from electron migration, which is too high of a voltage at too high of a heat. obviously, you dont have this issue.

Thats what I figured. The trouble is no one is very good at confirming what exactly constitutes a too-high voltage. I've heard some people say anything over 1.35v is too much, but I also read that intel has cleared these chips to up to 1.52v.

Also, when people say 24/7 use, I'm guessing that factors in the fact that the chip throttles down when idle, right?
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post #7 of 24
Quote:
Originally Posted by Ragnarok05 View Post

Thats what I figured. The trouble is no one is very good at confirming what exactly constitutes a too-high voltage. I've heard some people say anything over 1.35v is too much, but I also read that intel has cleared these chips to up to 1.52v.
Also, when people say 24/7 use, I'm guessing that factors in the fact that the chip throttles down when idle, right?

Yeah, I would of gone with Intels max VID which is 1.52v, I'm just not sure how much of that value is a chip will survive (the guarantee period?) and how much of it is above 1.52v it exceeds the TDP and prolly a few more factors that I'm unaware of. I'm not sure Intels cooler is sufficient for stock clocks at 1.52v even though Intel seem to be saying they will sell one with a VID up to it, there must be a reason for that.
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post #8 of 24
Thread Starter 
Quote:
Originally Posted by Darren9 View Post

Yeah, I would of gone with Intels max VID which is 1.52v, I'm just not sure how much of that value is a chip will survive (the guarantee period?) and how much of it is above 1.52v it exceeds the TDP and prolly a few more factors that I'm unaware of. I'm not sure Intels cooler is sufficient for stock clocks at 1.52v even though Intel seem to be saying they will sell one with a VID up to it, there must be a reason for that.

Well, from my (admittedly limited) experience with intel stock coolers, my opinion is that theres no way in hell a stock cooler could handle the temps generated by 1.52v, lol.

Im guessing I should be safe at 1.375v though, I mean, I saw on another thread here a list of all the confirmed OCs with the i7 series, and most seem to be above 1.36v at around my clock speed, so I should be safe.

I guess if worse comes to worse I just drop back to stock.
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post #9 of 24
Quote:
Originally Posted by Ragnarok05 View Post

Thats what I figured. The trouble is no one is very good at confirming what exactly constitutes a too-high voltage. I've heard some people say anything over 1.35v is too much, but I also read that intel has cleared these chips to up to 1.52v.
Also, when people say 24/7 use, I'm guessing that factors in the fact that the chip throttles down when idle, right?

Throttling down will save the CPU for a much longer period of time.

Also, voltage does not kill CPU's. there is no such thing as "too high" ..temperature AND voltage kills cpu's. Lets say for example you have a phase change cooling set up. those are good for about 15f temps at load. you could easily run 1.5-1.55v 24/7, because the CPU is cold enough that the electrons arent jumping around and destroying the CPU. if you ran it on air it would be possible, but it would degrade very very quickly.

generally on air and conventional watercooling setups, 1.35-1.45 is the general rule of thumb for a safe operating voltage (for Intel). Also, the colder you go, the more stable the CPU will be at higher clocks. thats why dry ice and liquid nitrogen is used for extreme overclocking
Edited by srsparky32 - 4/20/12 at 9:43pm
 
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post #10 of 24
Speedstep will throttle you down at idle. Every chip is different of course and there are no guarantees in the oc game. That said I feel very good that 1.375v is well within the safe zone. I would feel comfortable as high as 1.47-1.48 for 24/7 as long as temps are good.

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