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i5 2500K decaying :o - Page 5

post #41 of 56
I am a little dubious about these chips degrading so quickly - I'm not doubting anyones findings but there must be something else at play here, microchips just dont degrade so quickly as far as I am aware.
post #42 of 56
It seems like every thread claiming that their chip might have degraded ends up being an unstable overclock or is fixed by a simple sfc /scannow. Glad to hear you have it running stable now.
post #43 of 56
Quote:
Originally Posted by dannybeckett View Post
I am a little dubious about these chips degrading so quickly - I'm not doubting anyones findings but there must be something else at play here, microchips just dont degrade so quickly as far as I am aware.
Cpu degradation has never been talked about so much since sandybridge was released. I agree it is very unlikely these cpu's will degrade so quickly with upto 1.4v but i do think over time they will degrade, Like over years not days.

Only time will tell i guess. But my old q6600 is still kicking strong with voltage higher than intels recommended max, And has been fine for three years so far with only average air cooling
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post #44 of 56
It could be your board. It sounds like you had your VCCIO or PLL set at the boarder of stability and it decided to dip a little a low. Setting them 2 clicks higher should solve it.
post #45 of 56
Yeah no doubt Chewy - of course chips degrade over time, and I would agree with your time period of years. I just doubt that intel would release a chip that degrades any way NEAR the timeframes that have been talked about in this thread.

My overclocked (1.8GHz --> 2.8GHz) watercooled operton 146 has been going since socket 939 was in fashion lol
post #46 of 56
Quote:
Originally Posted by Chewy View Post
Cpu degradation has never been talked about so much since sandybridge was released. I agree it is very unlikely these cpu's will degrade so quickly with upto 1.4v but i do think over time they will degrade, Like over years not days.

Only time will tell i guess. But my old q6600 is still kicking strong with voltage higher than intels recommended max, And has been fine for three years so far with only average air cooling
Exactly, I do terrible things to my cpus & really don't see much in the way of degrading. It can happen, but I really can't see it being that widespread.
    
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post #47 of 56
Guys, calm down please.

First, good job on fixing your CPU. I suggested the PLL boost because this helped make my BSOD happen much later at 4.5 ghz, if the CPU vcore was too low (though it still happened), and it also stopped my idle/low load bsod at 5 ghz.

Second: Yes, guys, degradation *IS* real. And I've tested the chips long enough to know it's real. Don't make the same mistake people did in the northwood days and say it's an urban myth, until people's P4's started dying left and right and degrading all over the place, and only THEN did people realize GNDS/SNDS was very real. Just do an archive search (I think the two main forums at that time were xtremesystems and ocforums.com).

Now, as already said, my "better" 2600k *DID* degrade. When you go from 1.236v stable at even high ambient temps for hours and hours, to BSOD'ing in 5 minutes, then that's degradation. (motherboard swap didn't matter). Yes raising PLL voltage helped some, but it didn't make it fully stable, though..still needed 1.260v load now to be stable. In my case, however the PLL boost helped the idle bsod at 5 ghz.

But again, when the chip was new and before I started doing those repeated 5 ghz prime runs, it ran at lower voltages without crashing at all.

Call it degradation, breaking in, whatevger, but regardless, if you have to raise any voltages to regain stability that used to be fine at lower voltages, that's degradation.

And I'll say it for a THIRD time: not all chips respond the same way! Some respond to VCCIO, some respond to PLL (or both), to let you use a little less vcore, some respond *ONLY* to vcore.

And my first 2600k degraded within days, and that was already a poor clocker with a high VID (needed like 1.5v for 5 ghz stable originally). And NO amount of ANYTHING (VCCIO, VCCSA, PLL voltage) would help, except vcore. And the vcore requirements kept rising. My second (lower VID, better chip) also degraded, but not as much, and does respond favorably to PLL (but that doesn't "reverse" all the degradation). So according to you guys, it's all in my head, right?

Another person over on XS had two chips degrade. But he said the common factor in his two chips was they were both bad clockers to begin with.

Please remember, EVERY CPU IS DIFFERENT!!! Feel free to give suggestions on what works for you and share it, but don't expect it to work for others. Compudaze lowered his vcore by LOWERING his PLL voltage. That didn't work for me--I had to RAISE my PLL to lower my vcore (and this ONLY helped with idle/light load bsod's, although it did make lower overclocks more stable, but still not stable enough: example: 1.248v load, 4.5 ghz, default PLL= BSOD after over an hour. 1.248v load, 1.88v PLL= rounding error instead of BSOD) after 5 hours. 1.260v default PLL= 12 hours blend stable. So there was a positive effect, but not quite enough). Full load stability still needs more vcore.

Just be lucky you guys didn't have your chips degrade by *400 mhz*, like that one folder did on Hardforum, after he folded for 2 months at 5 ghz 1.5v, now he can't pass 4.6 at the same voltage....(that was 24/7 folding, however).
Edited by Falkentyne - 5/25/11 at 5:19pm
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post #48 of 56
i can say i'm pretty sure my 2600k has degraded after 2-3 month of 24/7 100% load (folding) at 4.9ghz 1.48v.. takes me over 1.5v to fold at 4.9ghz now.. temps were 55c-65c.. had to bump it down to 4.8ghz 1.44v...

so no, it's not like 15 years vs 10 years... not with sandy bridge at least
post #49 of 56
To the OP.
It's really strange to have that degradation in a matter of days with such lower voltages.
Have you considered a faulty chip?

I'm not saying that degradation can't happen. That's way i'm against stressing the CPU for more than 4-6 hours.
For example running prime95 blend and LLC on "extreme" i'm in the range of 1.352 at idle and top of 1.386 when in load. My temps never go higher than 66.
I'm very skeptical about vcore safe range. I have been googling for weeks and, someones says no more than 1.35, others no more than 1.38.
ASUS oficial p8p67 pro says that a 1.400 - 1.425 is safe for daily usage.

http://www.xtremesystems.org/forums/...d.php?t=265398

And now you are saying that degradation can occur under the 1.3 range.
I'm not saying that anything what are you saying is not true. But this is not real consensus about this subject.

I'm use my PC about 6 hours a day. Reading blogs, forums, youtube. No heavy loads.
And now, I'm afraid of turning my PC on. I now this is a bit extreme.

I would like to hear your opinion of the subject.
post #50 of 56
What I have found is that I can get stable at 1.384v so long as a keep the temps <65'c
Soon as they go >75'c then I need more voltage to keep 12+ hour Prime95 stable.

You wouldn't notice it in gaming due to the low stress it puts on the CPU, I mean mine barely touches 50'c in gaming.
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