4670k OC To 4.8?

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Matt-Sir

Matt-Sir

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Sep 14, 2013
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Hi, I've oc'd to 4.6GHz but wondered if I would be safe to go to 4.8 with the volts? I'm currently at Per Core setting with 46, 46 ,45, 45 with Min Core 39 and Max Core 46, Volts at 1.250, would I be safe to go to 4.8 judging by the volts I have atm? idle average temp is around 45c. RAM is @ stock @ 1600. Cooler is H100i
 
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45c idle seems kind of high what is it under load? If prime95 is pushing it to over 80 you're probably too high anyway. As far as voltage goes, it all depends on what you can cool really. Most don't want to go above 1.3 but I've seen 24/7 builds go as high as 1.5. That seems like not a bad chip so you may want to consider delidding it to get the temps down, just make sure if you do you use a quality thermal paste like liquid pro.
 
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Under load it maxxed about 55, I haven't run any synthetic tests because the way I see it is if it can handle what I'd usually use it for then the oc is good. The thermal paste I'm using is arctic silver.
 
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i actually have this chip and in my experience those idle temps are pretty high but under load they are super safe HOWEVER, if you run a synthetic test you will more than likely get a BSOD x 124 error.

If you want to get to 4.8 then i would seriously consider fine tuning your over-clock as you may find that your current 4.6 over-clock is unstable (please note the word MAY , i'm not saying it isnt)

if its worth doing , then do it right a 4.8 clock on the haswell chip is on the rare side my friend and if you persue this route i wish you the best of luck , upto 1.3v is fine on these chips but i would seriously consider getting the 4.6 stable though synthetic testing as you may find that you could reduce current voltage or increase it.

if you need any help, in achieving this i'm happy to help matt.

remember the CPU has a memory controller on it and if you have overclocked your ram this will add heat.

Jonny
 
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Another great example of a 'stable' system gone t*ts up! :) mate, seriously synthetic test.

read this : http://www.overclock.net/t/1411077/haswell-overclocking-thread-with-statistics and IF you need help , drop me a message i'm happy to help.



that heat is no-where near the upper limit of the chip. don't frett about temps til you hit 90 deg (which you will if you ise IBT , use Prime 95 for syntetic testing.

 
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Synthetic tests present your system with the worst case scenario, that's why you should use them to test stability. This is mostly because your ambient temperature is going to vary greatly and even a small change can cause your OC to become unstable. Average temperatures aren't as important as your absolute maximum because that's when things will likely fail.

If you test your system with prime95 and you hit the 90's it's too hot and you need to either cool it more aggressively (water cooling) or reduce the voltage and multiplier. To be perfectly honest you won't notice a few ghz change in clock speed in most games anyway.
 
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To be completely honest, I'm only overclocking because I have a k series proc. What length of time should I run prime95 for? Is there anything specific I should keep and eye out for? I've never ran synthetic tests before so It's new to me.

Ran Prime95 for approx 3mins and 1 core got 90 max so I stopped the test. I guess that means it's time to drop the clock.
 
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yes mostly voltage though. If you can drop the voltage and have it stay stable at whatever clock, then you're set. Most people run prime95 for 4+ hours, if you're not that concerned with it you could just let it go for an hour or two and see.
 
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Matt-Sir,

i seriously recommend you spend some alone time reading this as i previously provided: http://www.overclock.net/t/1411077/haswell-overclocking-thread-with-statistics

it has all the info you will need and explains it in great detail.

I'm not trying to discourage you from asking questions, but your are playing with fire if you don't understand the basics of over-clocking and stress testing. Alot of people come on the forums asking for the quick fix and when it comes to over-clocking but every single computer system is different in that, what works for one doesn't work for all.

Being in absolute control of your over-clock is very rewarding on a personal level (afterall you bought the k chip and aftermarket HSF for a reason didn't you?)

i'm here to support you though this journey if you are prepared to self-educate first so please read the information in there, it's really user friendly, otherwise, I'll leave this thread alone and wish you good luck.
 
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Looking back at your initial post idling at 45c is pretty high when you have an h100i. This makes me think that you might have your cooler mounted incorrectly or you your machine set up in a fairly hot place to begin with. Water cooling isn't going to get you any lower than ambient temperature so if you're not willing to crank up the AC it's still going to run hot. So my previous advice to lower the voltage and multiplier until you get acceptable temperatures is still valid. The only way to get temps down more is to delid your cpu which I don't think you're going to be willing to do from what you've said so far.
 
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