Thoughts on my 4690k overclock - safe enough to keep going?

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Hi everyone,
I'm in the process of overclocking my i5-4690k. I've gotten it up to 4.2GHz, and am currently stress testing it with Prime95 at 4.3. It's hitting a high of 76C. Everything I've read says to keep this particular chip under 80 when stressing. I've got the CM Evo 212 on it.

Here's a few screens of where I'm at.

Temps: http://i.imgur.com/m6QxHtH.png
CPU-Z: http://i.imgur.com/J5S7X2E.png

Given this info, could I safely keep going (pending the extended P95 test at 4.3)? Just keep an eye on the temps during testing, and find a threshold for heat, and what would that be, in your opinion? In my mind, if I hear "keep it below 80" I'd be afraid to get around 78 or so.

My understanding is that the Core Voltage for this chip should sit right at 1.2; I've seen others suggest to raise it to, say, 1.25. But again, I worry about the temp. Thanks for any help you can offer, and sorry if any of these are dumb questions. Still pretty new to this.
 
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volcanoscout
Personally I go by: 70 and under=great, 71-80 = good, 80-89= okay, but keep an close eye on it, 90+ = shut it down and recheck settings. Every chip is different, so your voltage requirements and thermal results are going to be unique to your chip. Your voltage ceiling should be 1.3V. The goal is to get a stable overclock with the lowest voltage and temps possible. With a 212, I doubt you'll get it over 4.6GHz without the temps going into the 90s.

If you've got it stable at 4.3, leave the clock alone and start lowering the voltage. When it crashes, go back to the last stable voltage. Then start upping your multiplier again. Again, every chip is different, but mine will run 4.6 at 1.15V, and then it jumps to 1.24V at 4.8GHz. If you...
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volcanoscout

volcanoscout

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Personally I go by: 70 and under=great, 71-80 = good, 80-89= okay, but keep an close eye on it, 90+ = shut it down and recheck settings. Every chip is different, so your voltage requirements and thermal results are going to be unique to your chip. Your voltage ceiling should be 1.3V. The goal is to get a stable overclock with the lowest voltage and temps possible. With a 212, I doubt you'll get it over 4.6GHz without the temps going into the 90s.

If you've got it stable at 4.3, leave the clock alone and start lowering the voltage. When it crashes, go back to the last stable voltage. Then start upping your multiplier again. Again, every chip is different, but mine will run 4.6 at 1.15V, and then it jumps to 1.24V at 4.8GHz. If you get to the point where you're up against either the voltage ceiling or the temp ceiling but it's stable, that's your max clock. To go higher, you'll have to upgrade your CPU cooler (and maybe case cooling, too).

Something else - there are a number of articles out that talk about Prime95 not being suitable for testing Haswell chips. Everyone has a different opinion on it, so you should read up on it and decide for yourself. Personally, I've stopped using it and currently use AIDA64.
 
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Thanks. I do have AIDA64 as well and I'll give it a try after tinkering with the voltage some. Would you suggest running it overnight, if after an hour or so it doesn't breach that 75-76 range?
 
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volcanoscout

volcanoscout

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Really it's up to you. Some folks think 12hrs is the minimum, others think 10-15 minutes is fine for confirming stability. Personally, I think an hour or two is fine. I'm too paranoid to run it overnight - I just know that, despite the fact that it's been steady at 75C for two or three hours, as soon as I fall asleep, it's going to jump to 105C and burst into flames.
 
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Ha! We think similarly, I see. I'm looking around at ASRock boards specifically, and what I need to be adjusting in the UEFI/BIOS as far as the voltage goes. I'm assuming the CPU core voltage is what I'm looking for. Thanks for your help.
 
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Well, after more testing, I got my stable overclock to 4.4GHz at 1.2V, with a high temp of 78. I'm a baby and kind of didn't want to go hotter. That's still .5 GHz more than the number on the box, so I'm pleased. Thanks again.
 
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I have a very similiar setup.

Asus Z97-A
I5 4690K
Cooler Master 212 Evo
G-Skill 8GB 2400

So last night i ran the 5-way optimization for the first time and it's settings for my machine landed at: 1.26vcore at 4.8Ghz and a X44 multiplier. Well it only ran for about 3 minutes before it went into BSOD so i backed the vcore down to 1.91v and the clock to 4.6Ghz then i ran AIDA64 stress test for 15 minutes and it was stable with a cpu temp of 65-68. When i restarted my pc the ai suite reverted my settings back to what it had originally set my oc too. So my question is how do i make it save the settings i want, or should i just be using the UEFI bios to make my changes? Also does the 5-Way optimization change my setting for my ram? I would also like to boost the speed on those since i did buy the 2400 sticks.

Thanks in advance.
 
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