voltage question help

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jdl92990

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Aug 29, 2013
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so i have the i5-4670k with the cooler master hyper evo 212 heatsink. I have been sitting at 4.3ghz with 1.265v. I wanted to try to get to 4.4ghz because it has been an issue to get there. So with my testing I found that at 4.4ghz i need a 1.325v to be stable on Prime95. my highest temp is 95C when it starts testing at 800,000 lucas-lehmer iterations. But it doesnt fail. My idle temps are between 29-33C. So my question is Could I stick with this to stay at 4.4ghz using 1.325v or is it just unsafe and just leave it at 4.3ghz.

My other question is why such a high jump in voltage for .1ghz.

Thank you for your help, I would appreciate your opinions and/or recommendations.
 
Solution
hunter315
95C is FAR too high, you will damage the CPU running at temps that high. The amount of extra voltage and heat needed to get that extra 100 MHz simply isn't worth it.

For each piece of silicon there is a maximum frequency you can get it to, it varies chip to chip. Perhaps yours has some FETs that just can't change states fast enough without the extra voltage to accelerate the transition, perhaps it has too much parasitics somewhere that needs the extra voltage to overcome the leakage at that frequency, it is impossible to tell which is why OCing is always done individually and experimentally.
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hunter315

hunter315

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May 12, 2009
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95C is FAR too high, you will damage the CPU running at temps that high. The amount of extra voltage and heat needed to get that extra 100 MHz simply isn't worth it.

For each piece of silicon there is a maximum frequency you can get it to, it varies chip to chip. Perhaps yours has some FETs that just can't change states fast enough without the extra voltage to accelerate the transition, perhaps it has too much parasitics somewhere that needs the extra voltage to overcome the leakage at that frequency, it is impossible to tell which is why OCing is always done individually and experimentally.
 
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