i7 4790k OC on Asrock z97 anniversary, what v core votage should I use?

[Cerativ]

Hello,

I've recently got i7 4790k and I wanna OC it quite high. I got question related with V core voltage
I have read on variety of forums that people use V core voltage on the level of 1.3 V at 4.5 GHZ OC
Suprisingly, as far as I am concered, that kind of voltage makes my CPU hot as hell
I decided to lower the CPU V core voltage to 1.16 and it work fine, no BS and it's all stable.
Why is that?
Does too low V core voltage at 4.5 GHz affect the stablity, durability and effectivnes?
Why people recommend 1.3V while I have no problem at 1.16V The lower voltage the better? What if I wanted to OC my CPU up to 4.7 GHz, what voltage should I use?

RIG:

CPU - I7 4790k
GPU - gtx 1070
ssd 240gb
hdd 500gb
8 gb ram
MOBO - asrock z97 anniversary
PS - xfx 650
cooler - dark rock advanced c1


Thanks in advance

 

[Multipack]

1.16 is a shockingly low voltage for stable 4.5GHz. Have you checked in BIOS and with various software? I think you may be getting a misreading.

 

[Cerativ]

Nah, I checked it also with Core Temp and it say's 1.16. I will post a Screen shot later this day

 

[jdcranke07]

Nah, I checked it also with Core Temp and it say's 1.16. I will post a Screen shot later this day

I'm actually not surprised by this. Haswell and Devil's Canyon chips take advantage of the low power states and actually overclock better with lower voltages when using them. My last 4790K I didn't know how to properly overclock since I was using an ASRock mobo (I personally found their UI to be super complicated). However, my current 4790K is on a Gigabyte mobo and is overclocking just fine. I can't remember the BIOS setting at the moment, but according to CPU-Z the voltage is sitting at 1.296V with the CPU overclocked to 4.8Ghz 24/7 (using this in a media server).

The moral of the story is that if you start facing instability, then increase your voltage. However, if you can lower it any more and still stay 100% stable, then go for it. Less power usage is better for longevity, as long as you aren't under volting the CPU (under clocking?). This will cause as much damage to the CPU over time as an overclock would.

 

[Multipack]

I am surprised http://www.anandtech.com/show/8227/devils-canyon-review-intel-core-i7-4790k-and-i5-4690k/2

 

[jdcranke07]

I am surprised http://www.anandtech.com/show/8227/devils-canyon-review-intel-core-i7-4790k-and-i5-4690k/2

I can tell you for certain that those voltages on the 4790K, in that review, are seriously too high. If you did an automatic overclock with profiles, then this could be the case. However, if you manually change settings and not use a profile, I can assure you that lower vcore is very possible.

Before my system and knowledge are contested, here is a validation link from CPU-Z.

 

[Multipack]

Silicon lottery I guess.

 

[JordanMihailov]

I guess it's not that surprising since i use mine at 4.4 at 1.13v.