i5 4670k wont oc over 4.3 Temps under 65C

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MilwaukeeGinger

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Mar 23, 2014
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Im looking for the best stable overclock that i can with my set up, but I must be doing something wrong. From what I've read, temps should be the limiting factor on the overclock, but that is not true in my case.

I understand that there is a huge "luck of the draw" situation with Haswell, but i feel there's no way I am reaching my limit.

My Specs:
CPU - Intel i5 4670K
GPU - Powercolo 7870 Myst Edition
MOBO - ASRock Extreme6
RAM - Corsair Vengeance 8GB Dual Channel DDR3 1600Mhz
PSU - Corsair HX 650
Cooler - Corsair H110 idle 29 Max 65ish
 
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Jonathan Cave
Computronix - I've read that link and the way i have interpreted the indo a 4670k shouldnt be ran > 1.3v.

43 CPU Ratio (Dynamic)
39 Ring Ratio
1.26v (CPU - Adaptive)
1.19v (Ring - Adaptive)
VCCIN = 1.76
Temps : ~65 deg

This is the highest i can go, as soon as i go to 4.4Ghz i need more than 1.3v - i assume this is simply down to the chip.
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MilwaukeeGinger

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Mar 23, 2014
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Im using a multiplier of 43 with BCLK at 100 Mhz. I had the voltage up to 1.3, yet anything over 43 was causing throttling and was only running at 35-40. im using Prime95 as my stress test
 
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ifreestylin

ifreestylin

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Dec 28, 2012
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Don't use prime95 for stress test. Doesn't work two well for Haswell. I find a quick 10 min run of OCCT always failed if volts are two low, and when you hit your thermal limit then leave AIDA64 for a few hours and you should be stable. i5 4690k @ 4.2 with 1.125 Vcore.
 
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Swede69

Swede69

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Jul 30, 2013
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4670k are not good overclocking cpus. The Devil's Canyon 4690k on the other hand, is a excellent overclocker(4.8Ghz). You will be lucky to maintain a 4.1Ghz OC on a standard 4670k. They were not built correctly with the correct TIM, first time around. Sorry mate you got screwed!
Check out my Firestrike score-
http://www.3dmark.com/3dm/4297917?
 
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Ellis_D

Ellis_D

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Jul 20, 2014
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With Haswell, there is a point where you have to start pumping massive voltages (as much as 100mv) just to reach the next multiplier. I'm not sure about the i5s but with the i7 4790ks, it's typically around 4.6ghz-4.8ghz. Honestly, when you get to that point, diminishing returns kick in and it's not worth it to push further.

Also, when you said you had the voltage at 1.3, do you mean you're using 1.3v for 4.3ghz or you were using 1.3v for multipliers above 43?
 
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CompuTronix

CompuTronix

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Nov 13, 2006
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Not quite so ... it's not that simple. A more thorough explanation is necessary.

Don't use version 28.5. Recent versions run AVX code on the processors Floating Point Unit, which creates unrealistically high temperatures. Version 26.6 will show core temperatures 10 to 20C lower.

You might want to give this a read: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

CT :sol:
 
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Jonathan Cave

Jonathan Cave

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Oct 17, 2013
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Computronix - I've read that link and the way i have interpreted the indo a 4670k shouldnt be ran > 1.3v.

43 CPU Ratio (Dynamic)
39 Ring Ratio
1.26v (CPU - Adaptive)
1.19v (Ring - Adaptive)
VCCIN = 1.76
Temps : ~65 deg

This is the highest i can go, as soon as i go to 4.4Ghz i need more than 1.3v - i assume this is simply down to the chip.
 
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