[SOLVED] i7-4790k Overclocking

[macioo]

Hello Guys,

I know it is old but I still using it

I have a problem to achieve 4,7GHz with my i7-4790k.

It is full stable on 1,25 Vcore with 4,6GHz, tested on PRIME for few hours.

But I can't go with 4,7GHz even on 1,34 Vcore it can crash the system when testing with PRIME.

Is is possible or I doing something wrong?

I set adaptacive voltage and Vcore on setting only. RAM is running with XMP.

My specs:

ASRock Z87 Extreme4
i7-4790K - I applied fresh coollaboratory liquid ultra under the IHS and temps are ok
1600MHz Kingston 4x4GB
GTX 980ti

Please for some tips eventually

 

[Zerk2012]

Hello Guys,

I know it is old but I still using it

I have a problem to achieve 4,7GHz with my i7-4790k.

It is full stable on 1,25 Vcore with 4,6GHz, tested on PRIME for few hours.

But I can't go with 4,7GHz even on 1,34 Vcore it can crash the system when testing with PRIME.

Is is possible or I doing something wrong?

I set adaptacive voltage and Vcore on setting only. RAM is running with XMP.

My specs:

ASRock Z87 Extreme4
i7-4790K - I applied fresh coollaboratory liquid ultra under the IHS and temps are ok
1600MHz Kingston 4x4GB
GTX 980ti

Please for some tips eventually

What were your temps running Prime 95 @4.6?

Devil's Canyon	All Core SSE Frequency	All Core AVX2 Frequency	BIOS Vcore	% Capable
4790K	4.60GHz	Not Tested	1.296V	100%
4790K	4.70GHz	Not Tested	1.312V	Top 96%
4790K	4.80GHz	Not Tested	1.328V	Top 68%
4790K	4.90GHz	Not Tested	1.344V	Top 22%
4790K	5.00GHz	Not Tested	1.360V	Top 3%

 

[macioo]

at the worst core there is 65°C in PRIME after 5minutes full stress testing

 

[macioo]

Any clues?

 

[dervis.vejzovic]

Stop using prime95 and aida94 on that CPU. Stres him in RealBench for 1 hour. Look at my voltage (Stable and tested)
https://www.sendspace.com/file/bqozgd

 

[ZeroDollarBudget]

Not all 4790k's are the same and it depends on your PSU&Mobo as well for the fine tweaking.... I got my 4790k to 5ghz, I've since dialed it back to 4.7ghz to 4.8ghz depending on the gaming session. That's running it between 1.4/1.42 volts. You may simply need more juice, as your cooler seems to be capable of keeping it under 70c.

 

[macioo]

Thanks for answers, for now it running on 4,7GHz stable in games, at 1,31vcore.
But why don't use prime95 for testing and temp must be under 70°C ?

 

[ZeroDollarBudget]

Thanks for answers, for now it running on 4,7GHz stable in games, at 1,31vcore.
But why don't use prime95 for testing and temp must be under 70°C ?

It doesn't have to be its just a good sign your cooler is doing fine. When people overclock it always means higher temps. You have lots of room to go based on the above!

 

[Karadjgne]

Welcome to the wonderful world of the Silicon Lottery. It governs ALL cpus. There's no 2 cpus in existence that are identical, they are similar and share similar properties, but the composition of the silicon used is Unique.

This gives each cpu a Unique characteristic. I had a i5-3570k that was stable at 4.3GHz all day long at 1.08v. It was not stable at 4.4GHz, even though most ppl had no issues with 4.5GHz. Even with 1.55v it was not stable. I also had an i7-3770K which is basically the exact same cpu as the i5 with hyperthreading enabled. I could hit 5.0GHz at 1.42v.

OC is a gamble. Amd/Intel guarantee a cpu at base speeds and certify that it should hit turbo speeds and remain stable. Anything after that is not guaranteed or certified or quantified. The Only guarantee about OC is that there are No Guarantees.

You get what you get, it's pot luck, a gamble.

Your cpu gets 4.6GHz.

Prime95 small fft is good for Temps. Asus RealBench is good for stability. Not the other way around. Test for one only with each program.

The difference between 4.6GHz and 4.7GHz is less than 2% performance. Equate that as being @ 2-3fps in a game. You won't see it, can't tell the difference, but the cpu will most certainly feel the difference with the elevated voltages, electromigration increase and decrease of life expectancy that always happens at those voltage levels. You should not be exceeding 1.3v on a 4th Gen Intel regardless of stability or lack of.

 

[dervis.vejzovic]

you're right. I am currently using this setting.
https://www.sendspace.com/file/4ofxpo

 

[dervis.vejzovic]

Thanks for answers, for now it running on 4,7GHz stable in games, at 1,31vcore.
But why don't use prime95 for testing and temp must be under 70°C ?

Its god for temp but disable AVX. avx on prime95 is unrealistic.