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i5 2500K decaying :o - Page 6

post #51 of 56
Quote:
Originally Posted by Chewy;13631405 
Cpu degradation has never been talked about so much since sandybridge was released.


I love this phrase biggrin.gif:D:D. Sounds so natural, given that before SB everyone could overclock between 4.5 GHz and 5.0 GHz. cheers.gifcheers.gif
 
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post #52 of 56
I was gonna post a thread to discuss degradation but came across this one instead. I had questions because degradation used to be an after thought for me. I never really thought about it to honest. I used to use AMD and before that Intel but never started overclocking until I switched to AMD with my first 955BE. I've always read about (with AMD) atleast not to go over 1.55v and while I never went that high or even over 1.48v, I never noticed any decrease in overclockability.

With these SB chips I am not so sure, it is true it seems to be talked about alot because overclocks that seemed to have been stable at certain voltages hit BSOD and all of a sudden are no longer stable. This happened to me a few weeks ago where I had a stable 4.7GHz after a couple weeks got a BSOD and chip wanted over 1.5 volts just to be stable. I initially tested 25 runs IBT-AVX & 24 hours of Prime95 on Blend stable. Anyway to make a long story short I sold that 2500K and bought a new one which is a much better CPU and I am currently running at 4.8GHZ with 1.380v. I have all powersaving features enables to reduce load and power on the CPU to avoid the possibility of degradation happening sooner.

It is scary because this subject just comes up alot with these particular chips and someone really needs to research the subject more in depth. I find it hard to believe that a chip can degrade with such little usage over a short duration of ownership but it's really beginning to look that way. I just don't know what to think when you complete all the stress testing with multiple programs, all pass but later errors start happening and you need more vcore to get stable? I am very reluctant to even attempt putting voltages over where I have them at the present in fear of ruining my CPU but on a positive note I am happy with it and it's ability to overclock well. I seriously believe my previous 2500K was a dud from the moment it exited the production line.
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post #53 of 56
mines been at 4.7ghz at 1.39v for a couple of weeks albeit with power saving on.
will report back if it starts to bluescreen and need more voltage but i honestly think it will be fine. once in a while i run it at 5ghz at 1.46v for cinebench etc and its still 100% but its early days yet. time will tell
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post #54 of 56
I think i you wanna play safe. Stay under 1.4. depending on the chip a your cooling solution you will have sandy for a long time.
If you upgrade every once in a while between 1.40 and 1.42 should be fine.
post #55 of 56
Initially I was able to prime95 blend 12+ hour with 1.25v @ 4200mhz. 1 week later needed 1.264v and then 1 week ago I re-did prime95 and it failed at 2-3 hour range. I never feed this cpu more than 1.28v and the max frequency I ran was 4400mhz. Idle at 30c, load at 63c during prime95 blend. I increase the voltage to 1.27v and I was able to prime95 blend stable again. I dropped the CPU PLL voltage from 1.832 (auto) to 1.75v and I was able to prime95 blend again with the same 1.264v vcore 3 days ago. Hopefully my 2500k won't decay further down. I have no BSOD during games, prime95 and every day usage, just core 3 failed prime95 blend test.
post #56 of 56
It sounds more than "settling down" that degradation. With luck you shouldn't need to increase vcore to mantain stability.
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