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Discussion Starter #1
I'll try to keep this short, but I would appreciate it if you folk could read it to understand my situation.

After years of owning my i5 2500K and running it at stock, I decided to give it a spin and OC it to 4.5GHz since everyone says it's easy. I do that following this guide (http://www.overclockers.com/forums/showthread.php/693613-Beginners-How-to-set-your-25-6-700K-to-4-5Ghz) , and right now after all the stress tests and everything the CPU is sitting fine at 4.5GHz, 1.35V.

After that I decided to push the volts lower and see how far I can go. I managed to go to 1.34V where all stress tests still passed and where temps are safe, but when I did the same thing at 1.33V and lower only 1 program gave me BSOD - Intel Burn Test (at Maximum).

The following programs are what I use for stress testing and all of them pass at 1.33 or lower voltage except IBT:

- Prime95 v26.6 (Small FFT's and Blend mode, 6h)
- Intel Burn Test (Maximum 10 runs, Very High 10 runs)
- Intel Extreme Tuning Utility (30 min.)
- AIDA64 Extreme (CPU, FPU, Cache) (1-2h)
- Asus RealBench (5 runs)
- Cinebench (5 runs)
- Battlefield 3,4,1 (2h+)

So far I'm at 1.32V and I pass all the tests stated above with the exception on IBT with full RAM usage, and if I actually set custom settings in IBT where my RAM is 90% of available it ALWAYS passes, but never when maximum ram is used. Now the temps get significantly lower when I reduce the voltage's and I'd rather like to keep it that way.

Now I wan't to ask you guys is how safe can it be to stay on an overclock which only fails at 1 stress test program, because the temps from 1.32-1.34V are quite noticeable.

This PC is used only for gaming and not any heavy encoding, folding etc..., so this is the whole point of starting this thread to see if I should bump the VCore up just because I fail on 1 stress test

My PC specs if anyone is curious are:

i5 2500K
CM Hyper 212+
AsRock Z77 Extreme4
2x4GB RAM
GTX 980 Ti

Thanks in forward.
 

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Iconoclast
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30,655 Posts
Safety of your data or hardware?

Less voltage than needed for stability is more safe/less damaging to the hardware. However, instability can be quite bad for data integrity, which can result in all sorts of issues if you get into unstable territory.

IBT set to maximum memory will often fail simply because part of the test data has to be paged out...one should always leave a few percent of physical memory available.

Regardless, running slightly lower than IBT stable volts is probably pretty safe for most of your data in most uses.
 

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I always set to 90-95% of free memory when testing ibt instead of full. If using full, you need to be sure that no background applications will utilize more memory than you have allotted for IBT.

The same is true for memtest. Need to leave a few percent for the OS not to overlap the memory allocation.

As stated above, data integrity is a concern when voltage is too low for an overclock. Hardware will not be damaged with too little voltage.
 

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Discussion Starter #4
Ok, thanks for all the replies guys.

I think I might revert to 1.34V to save myself of starting new games in games I play, but do you think for an i5 2500K @ 4.5GHz that temps between 60-70C when gaming is high ?

Thanks.
 
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