Safe Overclocking Voltage?

[AdvocateOfNyx]

I watched a JayzTwoCents video on him overclocking a 4790k and he said he was concerned about killing his chip from running it at 1.501V.  I currently have mine set higher than this...  This is my first time overclocking so I just want to make sure these numbers are okay.  I have a 4670k in an Asrock Z87E-ITX.

 

CPU Ratio: 42

CPU Cache Ratio: 38

VCore Voltage Mode: 1.180V

Fixed Voltage: 1.55V

 

I ran a quick test (will do a longer one once I hear it's safe) of 10 mins on AIDA 64 stability test and have a max temp of 80 to 82 degrees (depending on the core).

 

Is this okay or is it dangerous for the CPU?  What is the safe fixed voltage and vcore range?

[Latvian Video]

9 minutes ago, AdvocateOfNyx said:

I watched a JayzTwoCents video on him overclocking a 4790k and he said he was concerned about killing his chip from running it at 1.501V.  I currently have mine set higher than this...  This is my first time overclocking so I just want to make sure these numbers are okay.  I have a 4670k in an Asrock Z87E-ITX.

 

CPU Ratio: 42

CPU Cache Ratio: 38

VCore Voltage Mode: 1.180V

Fixed Voltage: 1.55V

 

I ran a quick test (will do a longer one once I hear it's safe) of 10 mins on AIDA 64 stability test and have a max temp of 80 to 82 degrees (depending on the core).

 

Is this okay or is it dangerous for the CPU?  What is the safe fixed voltage and vcore range?

I'm kinda new to overclocking too, but I think you should be able to lower the voltage, since people have gotten 4.8ghz with lower voltages

 

Edit: some threads are saying that 4.3ghz @ 1.2v was stable for them

[AdvocateOfNyx]

Just now, Latvian Video said:

I'm kinda new to overclocking too, but I think you should be able to lower the voltage, since people have gotten 4.8ghz with lower voltages

That's exactly what I thought too.  I'm trying changing from a fixed voltage to an offset of like 0.1?  Gonna check stability and see if maybe thats a better option, I really don't understand this stuff at all yet.

[Latvian Video]

Just now, AdvocateOfNyx said:

That's exactly what I thought too.  I'm trying changing from a fixed voltage to an offset of like 0.1?  Gonna check stability and see if maybe thats a better option, I really don't understand this stuff at all yet.

Make sure you check if it is doing - offset, not + offset

[AdvocateOfNyx]

Just now, Latvian Video said:

Make sure you check if it is doing - offset, not + offset

It's a + offset by default, is that bad?

[Latvian Video]

1 minute ago, AdvocateOfNyx said:

It's a + offset by default, is that bad?

Change it to - offset, if it is +, you will be increasing the voltage by the offset you put in

[AdvocateOfNyx]

1 minute ago, Latvian Video said:

Change it to - offset, if it is +, you will be increasing the voltage by the offset you put in

Isn't that what I want if I'm overclocking though?  I mean obviously less voltage is better but if I'm increasing the clock speeds don't I also need to increase the voltage?

[Latvian Video]

1 minute ago, AdvocateOfNyx said:

Isn't that what I want if I'm overclocking though?  I mean obviously less voltage is better but if I'm increasing the clock speeds don't I also need to increase the voltage?

From what I understand, You would need to decrease the voltage as much as possible, while maintaining stability, also the thermals are better with lower voltages. 

[AdvocateOfNyx]

1 minute ago, Latvian Video said:

From what I understand, You would need to decrease the voltage as much as possible, while maintaining stability, also the thermals are better with lower voltages. 

Okay, well my new settings are:

CPU Ratio: 41

CPU Cache Ratio: 38

VCore Voltage Mode: 1.180V

Voltage Offset: -0.01

[Latvian Video]

6 minutes ago, AdvocateOfNyx said:

Okay, well my new settings are:

CPU Ratio: 41

CPU Cache Ratio: 38

VCore Voltage Mode: 1.180V

Voltage Offset: -0.01

I'd stress it again, if is stable, lower the voltage a little bit more, repeat until it isn't stable anymore, then do the last voltage which was stable

edit: also you can increase the ratio a little too, if you want

[SkilledRebuilds]

1.5 is way high for a 4790k (IMO from my 4.8 Needing 1.39v) I'm also in Australia, usually warm AF.

I wouldnt go over 1.4 myself and even thats quite high vs typical results people use.

 

Im at 4.8 1.39v, 4.7 1.36v, 4.6 1.3v

Cache is 4.5 at 1.33v

 

Even if it degrades over time, just lower clocks 100Mhz, by the time it gets worse you'll likely replace it anyway.

[AdvocateOfNyx]

Just now, Latvian Video said:

I'd stress it again, if is stable, lower the voltage a little bit more, repeat until it isn't stable anymore, then do the last voltage which was stable

The offset, VCore, or both?

[Latvian Video]

1 minute ago, AdvocateOfNyx said:

The offset, VCore, or both?

The offset

[AdvocateOfNyx]

1 minute ago, SkilledRebuilds said:

1.5 is way high for a 4790k

I wouldnt go over 1.4 myself and even thats quite high vs typical results people use.

 

Im at 4.8 1.39v, 4.7 1.36v, 4.6 1.3v

Cache is 4.5 at 1.33v

 

Hows the cooling temps on the 1.5v?

I only ran it for 10 mins with those settings, but my max temp was 82 on one core and 80 on all others.

[SkilledRebuilds]

1 minute ago, AdvocateOfNyx said:

I only ran it for 10 mins with those settings, but my max temp was 82 on one core and 80 on all others.

Air or Water cooling?

[AdvocateOfNyx]

Just now, SkilledRebuilds said:

Air or Water cooling?

Stock cooler with noctua thermal paste

[SkilledRebuilds]

Disregard my previous post because I misread that you had a 4790K not a 4670K, there is a temperature difference between the differing thread counts and usage within the processor between both instances.
But I hold firm on 1.5v being excessive, it's off topic now as you are using much lower voltage than that now.

Best of luck chasing the sweetspot.

[-rascal-]

1.50V fixed VCore for ONLY 4.2 GHz is really high.

 

My i5-4690K @ 4.8 GHz needs around ~ 1.42V .... and it's been running like this for the last 4 ~5 years now.

That said, it's paired with an ASUS ROG Maximus VII board, and a NZXT X61 280mm AIO.

 

LTT made the Devil's Canyon overclocking guide a couple years back.

Considering the i7-4790K and i5-4690K are both Devil's Canyon, it's a good place to start.

 

The 4th Gen Overclocking Guide is good too -- I actually followed this.

In this video Linus suggests 4.8 GHz to start. 48x might be too aggressive to some CPUs.

Better to start at say 44x or 46x, and move up to 48x ~ 50x.

 

 

 

[AdvocateOfNyx]

5 hours ago, -rascal- said:

1.50V fixed VCore for ONLY 4.2 GHz is really high.

 

My i5-4690K @ 4.8 GHz needs around ~ 1.42V .... and it's been running like this for the last 4 ~5 years now.

That said, it's paired with an ASUS ROG Maximus VII board, and a NZXT X61 280mm AIO.

 

LTT made the Devil's Canyon overclocking guide a couple years back.

Considering the i7-4790K and i5-4690K are both Devil's Canyon, it's a good place to start.

 

The 4th Gen Overclocking Guide is good too -- I actually followed this.

In this video Linus suggests 4.8 GHz to start. 48x might be too aggressive to some CPUs.

Better to start at say 44x or 46x, and move up to 48x ~ 50x.

 

 

 

I actually have a 4670k - the 4790k I was talking about was from a JayzTwoCents video like I said.  That said, I watched the LTT Haswell overclocking guide, but he doesn't talk about the difference between a fixed/offset CPU voltage and vcore.  I don't understand the difference.  I made a post here asking but got 0 replies.

 

Additionally, he says to use a type of power that my motherboard doesn't support.  Mine only has fixed or offset while he says to used some optimized mode that I don't have.

[AdvocateOfNyx]

I think I found what could be good settings for me.

42 all core ratio

38 cpu cache ratio

1.150v VCore override mode

-0.050v offset CPU input voltage

 

I'm hoping these are more reasonable settings?  Attached is my HWMonitor and AIDA results after an hour and forty five minutes of stress testing.