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Old April 21, 2014, 05:34 AM
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Default Questions about OC on i7-4930k

I currently have an OC on a i7-4930k at 4.6 Ghz I've run 2 separate Prime 95 for 12 hrs a piece NO crashes at all. I did have to turn down my Dram speeds to 1866 down from 2400 because it seemed like the memory controller couldn't handle 32 GB at that speed

My Vcore is 1.292 according to CPU z and on my motherboards AI suite its 1.292-1.308 Vcore and my Bios says 1.296 Vcore. I did this manually no offset.

My highest temp during testing was 59c

I just want to know if this is normal. I've plowed through multiple forums and i just see people at 1.38 vcore or higher for this OC. Is this normal? any cause for concern ? am i just lucky?
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Old April 21, 2014, 08:57 AM
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4.6 Ghz around 1.3v doesn't sound unreasonable. Also, voltage monitoring can be off on motherboards (although higher end ones usually are pretty good) and they do not seem to report LLC voltage increases. You must have some nice water cooling to keep the temps that low. I would not expect many people to need 1.38v until hitting 4.7 Ghz on one of these chips. It sounds like you got one of the better ones though.
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Old April 21, 2014, 09:48 AM
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Thanks, I have an Alphacool UT 60 240 mm for my CPU. I have a heatkiller water block as well. I keep my Video cards separate from it in another loop with another alphacool UT60 + XT 45.

I was just worried something was off. I dont see spikes in voltage i watched for it the max reported by the AI suite is 1.308v im using an Asus Rampage IV Black Ed. Thats the highest reported anywhere on my system. I do see a drop to 1.280 in CPU Z. But like my mobo reports 1.296. So if they are correct then i must be really lucky

Last edited by Warcrimes; April 21, 2014 at 10:39 AM.
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Old April 21, 2014, 11:57 AM
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Without using a DMM you'll never know 100% if your motherboard is accurately reporting voltages, but 95% of the time high end motherboards are quite accurate with voltage monitoring.
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Old April 21, 2014, 07:07 PM
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I currently do not own one. Any other way besides that?
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Old April 21, 2014, 07:46 PM
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Im using a Asus Rampage IV Black Ed. I feel like there isn't much more high end. I looked at my temps compared to others. Voltages across 3 ways of checking seem to be really close 1.280-1.292 CPU Z, 1.296 Bios, and the AI suite 1.292-1.308 My LLC is set to High and 34-42c while gaming on my CPU. I feel safe just wanted to get another opinion and i appreciate your help thanks alot
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Old April 21, 2014, 10:25 PM
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Yeah, from what I have seen other people doing with their own over-clocking, it seems most people are having no problems with damaging their chips by staying under 1.34v for 24/7 use. You shouldn't worry as long as you keep those beautiful temps.
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Old April 22, 2014, 09:02 AM
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Thanks, I havent read that yet. So im glad i didnt get that close to OC this chip. I appreciate the heads up
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Old April 25, 2014, 09:52 AM
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vcore of 1.4v as a Max should be fine......what is your vcore under full load?
And really you should try to migrate over to "Offset Mode OC'ing".....my CPU sits at a nice .0898v when surfing the Net etc and jumps up to 1.38v when gaming ;)

There really is no rime nor reason to using Offset Mode, its basically trial by error, if you found a stable OC with a specific vcore (under load), then using Offset Mode, simply try to match the same vcore under load.
If you start out with a negative offset, just keep stress testing until everything is stable....bumping up your offset by .005v increments (I think its .005v not .05v.....cant remember for sure now)....for example, with my 3930K and RIVE:

OC 4.9 Ghz requires Offset +.09v....vcore load is at 1.398v...of course idle it drops back down to .0898v ;)

If you go over to ROG Forum there are some good Offset OC'ing Guides available

And es, if you have the RIVBE.....with a 4930K...its a primo set-up, under water you should be looking for 4.8 - 4.9 Ghz....for benching 5 - 5.2 Ghz
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Old April 27, 2014, 06:04 PM
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I managed to get a manual OC now stabled for 12 hrs of 95 prime at 1.296 Vcore at full load. I tried offset but wasnt able to find the lucky spot. ill try it again.
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