Need help over clocking 4670k

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zacw

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Oct 25, 2013
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Hey guys, I know this is posted all over the forums, and there is numerous variables in regards to how much you can over clock your particular CPU.
I have read numerous guides, watched numerous youtube videos and tinkered for 3 days now and I have refrained from asking for help until now.

My goal:
4.5 ghz a nice flat 25% increase in performance.
I have the Asus v1 formula - beautiful motherboard. An aftermarket CPU cooler Noctua NH-D14 the beast.
and the Intel i5 4670k

In regards to testing I followed linus youtube video for over clocking as it clearly explained all of the functions and how to adjust them and I am fairly confident with majority of the settings now.

However I just can't get a stable over clock. At the moment I have been running Intel CPU burn on very high settings for 10 runs through, and if it passes that I was going to move on to Aida 64 and run the stress for a couple hours. But I always fail intel CPU burn no matter what setting I put it on, either with a blue screen, freeze or just a quick restart not once has it come up detailing what it failed or when.

I use CPU-Z to check the clocks, Asus Ai suite to double check and authenticate the clocks have gone through. Though this is where I have a discrepancy in values. My Ai suite idle temp is 24 degrees. my idle temp on Real temp (not GT) is 40 degrees + also on real temp my 4th core is 12 degrees cooler then the rest. Not sure what to make of this or what one to believe I know there mounted in different spots but it still seems drastic to me?

Anyway moving on, I have put my CPU at 4.5 and I started my volts at 1.2 slowly incremented it up until 1.25 and I have read you shouldn't really push past that without a proper liquid cooling build (not the H100i). My computer starts up with many of those volts, and I can even run 3dmark 13 with some of them, but as soon as I run Intel CPU burn it crashes. I really want to get my first stable OC down before I delve into my GFX card OC, but anything past 1.25 volts shows up on my AI suite as 40 degrees spiking to 80 max, real temp however sits about 60 and jumps up to a max I have had so far of 96 and that worries me as I don't want to go past 90 degrees. Anyway guys if I could get some help would be awesome.
Also, Asus 4 way optimisation over clocks it to 4.4 so... if the computer can do a clock like that surely I must be able to accomplish something better.
I also tried modifying the cache ratios to 1:1 and leaving it on auto didn't work.

And even once I find a stable CPU clock, I want to activate the XMP profile for my RAM which is G.Skill Trident X 2400 and I am unsure if this means extra voltage from CPU I heard they kind of interrelate and can cause instability etc. Sorry for the long message just wanted to cram in as many details as I could
Cheers,
Zac
 
Solution
D
1. When the intel burn test finishes but shows as unstable, then the OC is unstable. What would probably happen if you left it like that is every so often your system would crash or restart, freeze, etc.
2. Yes, increasing the voltage would increase the stability but the only way to know how much you need is to try it and test it.
3. 1.250 might be okay but the only way to know is to try it. Basically the first thing to do is find your stable point. So if you are determined to run it at 4.5, increase the voltage until you can pass the intel burn test. Then once that is done, run the aida stress test and see what temps you are getting. Aida is good because it will load up the CPU and show you the core temps all in one. You can...
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Deuce65

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1. I don't know about those temp readings as I don't use either of those programs, but you said you have Aida so check what that says. It will give you accurate core temps.
2. You have pretty much answered your own question. You put the chip at 4.5, gave it 1.250, and it isn't stable. Thats really all there is to it. Either turn down the clock and try again at a lower speed, or turn up the voltage and try again at a higher voltage (not recommended given what you said your core temps are unless you can get those temps down). That's really all there is to it, there is no magic button to press to make your chip better. Some people get very lucky and get chips that will run fast and stable with low voltages, some people get unlucky and get chips that won't. Yours sounds to be somewhere in the middle. Now, there ARE things you can do to get your temps down which may allow you to go higher in voltage before running too hot. You could get a better cooling solution, but for you that would essentially mean custom water cooling as you are already maxed out on air. You can try delidding your CPU, that will probably get you 10 degrees or so right there.
3. Get your CPU stable first then worry about the memory.
 
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zacw

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Oct 25, 2013
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Thanks for the quick responses, really appreciated. I'm not into deliting my processor or at least not at this moment. In regards to a better cooling solution I spent the last week sifting through my options and came up with a sweet set up around $300 for a single radiator build with expand ability in the future. but as I just spent $2800, $1300 over budget I'll be getting it in a couple months down the line, for now this is fine. In regards to the temperatures, just had AIDA 64 open, AiSuite3 and Real Temp and yeah with Intel Burn test AI Suite doesn't update frequently enough. So the AIDA 64 and Real temp were pretty close with it spiking to low 90's for a couple seconds then dropping down to 50-60 and I'm fine with this.
Anyway went back to the drawing board, reset all settings to optimised defaults and started again. at 4.5 at 1.24V I ran Intel Burn test on 'very high' settings and it ran through passed all tests in 15 rounds. I then turned the XMP profile on and again it ran through all the tests at only 2 degrees higher then 1.23V. Anyway without a BSOD, 'blue screen', freezing or anything of the sort which was a success however at the end of it Intel Burn test Notified me that the clock is unstable. I am not sure if this means I need slightly more volts? Also I have left the cache ratio at auto, i heard 1:1 is the best does having it run at 1:1 increase stability or lower it?
I am okay with it reaching high temperatures for a few seconds as is my understanding real programs, and games wont demand 100% so I wont see those temperatures.
Once again thanks for the quick replies
 
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zacw

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Also would running it at 1.25 be too much? I have heard lots about not going past 1.3 and seen other people rocking different voltages. I understand there is tons of variables mainly including cooling differences but I want to know if I can find a sweet spot at 1.25 and run everything maxed I would be happy with that providing that 1.25 is a general rule of thumb still acceptable.
 
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Deuce65

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1. When the intel burn test finishes but shows as unstable, then the OC is unstable. What would probably happen if you left it like that is every so often your system would crash or restart, freeze, etc.
2. Yes, increasing the voltage would increase the stability but the only way to know how much you need is to try it and test it.
3. 1.250 might be okay but the only way to know is to try it. Basically the first thing to do is find your stable point. So if you are determined to run it at 4.5, increase the voltage until you can pass the intel burn test. Then once that is done, run the aida stress test and see what temps you are getting. Aida is good because it will load up the CPU and show you the core temps all in one. You can leave it running for however long you feel is needed. If you are happy with your temps, then congrats! You are now at 4.5 stable. If you are unhappy with your temps then you will have to turn down your voltage, which means you will have to turn down your clock speed.
4. It isn't that 1.300 volts is bad per say, it's that under normal circumstances, you won't be able to keep the chip cool enough with the air cooling you are using.
 
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zacw

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Okay I may have successfully done it. I added + one to the voltage at 1.24 equaling 1.248 according to CPU-Z and ran the test again and it reported a success so it seems I may have found the sweet spot at least running Intel Burn Test. Now its over my CPU is idling between 35-42 degrees. Is this alright?
Now I have my CPU cache ratio set to auto should I turn off auto level the cache to a 1:1 ratio? run one more test to check for stability if it checks out turn on adaptive as my understanding is that adaptive basically lowers the voltage down at idle but when a CPU intensive application begins increases it?
going to run AIDA 64 now.
 
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Som3one

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Since most of your questions have been taken care of, here are just some additional thoughts:

AISuite uses a different temperature sensor than the other monitoring tools. That sensor is only positioned "near" the CPU which is why those temps are lower than the one showing in CPU-Z or whatever. Also, this is the reason why I wouldn´t recommend using AISuite to monitor your CPU temps. For everything else, it´s pretty good though.

As for the temps in general: I really wouldn´t aim at anything higher than temps in the low to mid 80s while running stress tests.
And for voltag (as you said) I wouldn´t go over 1.25-1.3. But of course there are lots of people with even higher voltages.
 
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zacw

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Okay so I have been running Aida 64 since my last update, I know that's not long in terms of how long I should run it and I will continue to run it and run some game benchmarks etc. Monitoring it with real temp got a maximum of 74 degrees on all cores, which i'm assuming is alright considering it is also a stress test?. Now my final questions, if I make my cache ratio 1:1 with the CPU volt will that improve stability? or could it make it unstable again.
And my last question, about the adaptive mode, assuming I put the cache ratio 1:1 all is stable and I enable adaptive it will scale the CPU down for average use and scale back to 4.5 when i'm running games etc? Once again thanks for everything guys I really appreciate it. now to overclock GPU... haha
 
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Deuce65

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Yes, that is warm but certainly not dangerous.
If you make it 1:1 it should make you less stable, not more. That would basically overclock your cache as well.
With adaptive mode, it is a little different. I assume you have been manually setting your voltage. If you change it to adaptive you are giving the system back some of the control over the voltage. So yes it turns it down when you aren't under load, but then turns it back up when under load. The problem is that it can then go over the amount you have set. So as you are at the max safe voltage, that could be a problem because the CPU can request and receive more voltage then you set for it. Google around, Asus has a good explanation of it somewhere, much better then I can give. I personally don't use adaptive mode at all as my computer is always under load 24/7 so perhaps someone else can explain it better, or like I said, look for Asus's article on the subject.
 
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zacw

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I matched the ratios and it all seems to be running stable at least for now, Ill run AIDA 64 over night and see if it returns any errors. I will also look up adaptive, its just because I need to adjust my fans based on usage etc. because right now with AI suite full speed is super load.. unexpectedly but turbo mode runs my fans at 1/4 of the speed of max which just doesn't make sense because on normal 1 fan stops spinning. So I might download speed fan and tinker with that. Also what may have contributed to the high temperatures which I failed to take into consideration is the fact that it was 31 degrees today and 29 inside my house so that's much higher then normal. I have been running AIDA now for awhile and now hasn't gone 68 degrees since its cooled down so perhaps I have successfully done my overclock but an overnight test will tell. Okay so thanks again everybody for your help, was really appreciated. On a side note if anybody knows or hears anything about 1.25 volts being to much on i5 4670k let me know.
Cheers
 
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