Overclocking CPU 4670k to 4.5Ghz. Need help

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Padzki

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Oct 13, 2013
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Hi,

First of all, I am a noob overclocker. This would be my first time overclocking my i5 4670k, and I seek guidance/advises from all you professional overclockers. Here is my spec:

@@@@@@@@@
CPU: intel i5 4670k
Mobo: Gigabyte Z87x-UD3H
RAM: Corsair Vengeance 2x4gb 1600
VGA: HIS R9 280x IceQ X2 Turbo Boost
Cooler: Corsair H80i
Case: Corsair C70 Artic White
PSU: Corsair RM850
SSD: Corsair Force LS 120gb
@@@@@@@@@

My goal is to reach 4.5Ghz with temps below 80C on full load.

Questions:
1. What voltage should I start from?
2. Do I need to change anything aside from the voltage? If Yes, please specify since I'm still new to this.
3. I've read reviews that you need to decrease the frequency of your RAM in order to reach 4.5Ghz?

5. Please make it as detailed as possible

Please advise,

Any response would be very much appreciated.

Thanks

 
Solution
koreanoverlord
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koreanoverlord

koreanoverlord

Honorable
Mar 6, 2013
644
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I've never overclocked an Intel, but I can answer some of your questions:

1. Leave your voltage at stock, increase your multiplier by small intervals until you error, when you do... you can then increase your voltage by a small interval, make sure you stay within safe limits (You will have to find these out yourself, usually Intel is way less than AMD). I would highly advise against starting at a high voltage and working your way down.

2. Adjusting other component's voltage can get you a higher clock, however I do not do this and cannot give you any insight.

3. Lowering your RAM Frequency will indeed make your overclock more stable.

EDIT: Also as a quick note. Disable all power saving options such as Speedstep, C1E, and APM. You will also notice your voltage dropping when your CPU is stressed, this is called vdrooping and you should look into this to see how you want to handle this. Usually changing your LLC or Load Line Calibration is the best solution. Be wary though, it make spike your voltage above safe levels.
 
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Solution
Y

Y0GI

Splendid
Jul 22, 2013
4,745
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24,960


Start out by raising Vcore to 1.250 v. and CPU Ratio to 42. Check for stability with programs like Prime95, Intel Burn Test. If stable, increase CPU Ratio to 43. Rinse and repeat. If you crash or BSOD, try increasing Vcore by +0.010 v. and try again. Maximum safe Vcore is 1.300 v.

There is a lot more good info on OC'ing Haswell in this thread: http://www.tomshardware.com/forum/id-1722630/intel-god-quick-dirty-guide-4ghz-haswell.html

Good luck!

Yogi

 
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