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Trying to overclock a 4790k - Page 3

post #21 of 29
Thread Starter 
Testing 4.7, Bumped up to 1.3v w/ 1.92 vrim, crashed in five minutes, Temps just barely scratching 80. Bumping up the vrim to 1.95. About how high can I set that setting without damaging the chip or board?

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post #22 of 29
VRIN really shouldn't need to be quite that high, it isn't needed quite as much as VCore. I would try testing 1.32V (only for stability testing) to see if that works without shuit down. If so, 1.3V 4.7GHz would be a decently stable OC for most tasks. It would not be 100%, as eventually at some time something would happen. But 1.32V is an acceptable voltage for 24/7. It depends on your comfort level honestly. I'm fine with my 4690k at 1.25V 4.3GHz right now.
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post #23 of 29
Thread Starter 
So far I'm getting past my original 5 minutes of prime with the 1.92 since I bumped it up to 1.95. Lunch break is over so I'll check and see how it made out in a few hours when I get back home. Temps are high 70s low 80s

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Edited by Spadz93 - 7/28/16 at 10:08am
post #24 of 29
Keep in mind too that Prime is very very intensive on your processor and will cause more heat and likelihood of crashes than just about anything else you would do with it. It's possible to be stable for everyday use but still crash in Prime. That's the case with my CPU. I'm using a 5820k at 4.515GHz at 1.35V. It will encounter errors or crash in a few minutes of Prime at these settings but playing games, video/photo editing and encoding, video transcoding work, 3D modeling work, etc it has been absolutely stable without a crash in at least 6 months of heavy daily use now. It may be heresy around here to say but you just might be "stable enough" with a little more tinkering if that is acceptable to you. Otherwise you might need to look at better cooling or more power still to get it truely stable. Also consider sticking a fan behind the CPU socket on the back of the board if you have room and something blowing down near the front of the socket if you can. In my experience this can drop core temps a good 10-15C in some cases which may help if heat is part of your instability.
 
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post #25 of 29
Thread Starter 
Quote:
Originally Posted by Fuzzywinks View Post

Keep in mind too that Prime is very very intensive on your processor and will cause more heat and likelihood of crashes than just about anything else you would do with it. It's possible to be stable for everyday use but still crash in Prime. That's the case with my CPU. I'm using a 5820k at 4.515GHz at 1.35V. It will encounter errors or crash in a few minutes of Prime at these settings but playing games, video/photo editing and encoding, video transcoding work, 3D modeling work, etc it has been absolutely stable without a crash in at least 6 months of heavy daily use now. It may be heresy around here to say but you just might be "stable enough" with a little more tinkering if that is acceptable to you. Otherwise you might need to look at better cooling or more power still to get it truely stable. Also consider sticking a fan behind the CPU socket on the back of the board if you have room and something blowing down near the front of the socket if you can. In my experience this can drop core temps a good 10-15C in some cases which may help if heat is part of your instability.

Truth, I've read that point a few times around here. Ideally, i do agree with you, but at the same time I'd like to make sure that it can really take a beating at these settings. I tend to multitask and also do some pretty tough video rendering (1080p or higher at usually 60fps or higher). Granted I'm sure it will still never hit what prime95 does, it's just good security i suppose
post #26 of 29
Thread Starter 
Update: got it running relatively stable at 4.7, vcore is 1.32 and vrin is 2.0 (vrin at 1.95 would crash immediately). Only thing is its pretty toasty, running mid to high 80s. Although it seems to be running just fine, idk how safe I feel with these numbers in terms of longevity. I'll see where the test goes. Like fuzzywinks said though, I doubt I'll be stressing the cpu as much as prime95 does
post #27 of 29
You won't be stressing it as much as Prime does unless you are torture testing. Even video encoding isn't as hard on the chip. 1.3V will likely keep you stable in everything except Prime at that speed.
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post #28 of 29
Thread Starter 
Is Aida64 a more realistic stress test?

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post #29 of 29
I would say it is, that is if you are using AIDA 64 v5.60 and not the latest one which if I remember correctly is v5.70.

AIDA 64 v5.60 Stress test with CPU + FPU + Cache + Memory gets my CPU to 81C.
AIDA 64 v5.70 Stress test with CPU + FPU + Cache + Memory gets my CPU to 94C.

I have a i7 4790K @ 4.7 GHz, 1.308V delided with Coolabratory Liquid Ultra between the CPU die and the IHS (Integrated Heat Spreader which is the metal plate that sits on top of the CPU) and the CPU Cooler as a Noctua NH-D14 with ambient room temperature at 23C.
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