i7 4790k 4.5Ghz 1.16v, its safe for 24/7?

[valen99]

Hello guys, i just bought a new air cooler (A CM MA620p), and decided to overclock from 4.0Ghz to 4.5Ghz. Validation: https://valid.x86.fr/yykw8s

Spoiler

First i tried with 1.25v and everything OK, then started to lower the voltage to 1.20v All OK, but with 1,15v AIDA64 stable (test duration 2 hours, CPU + FPU + cache test) but then i tried PRIME95 26.6 (Smal FFT), at the 9 minutes i got a BSOD, so tested again with 1.16 and 1 hour later, everything was fine.

The temps where:
For stock
MAX CPU Temp: 64c (avarage of 60c)
VRM Max Temp: 51c

For 1.25v
MAX CPU Temp: 87c (average of 85c)
VRM MAX Temp: 58c

For 1.2v
MAX CPU Temp: 87c (average of 82c)
VRM MAX Temp: 56c

For 1.16v
MAX CPU Temp: 80c (average of 78c)
VRM MAX Temp: 54c


So now i just want to know if its safe to leave the 1.16 voltage even at idle for a 24/7 machine.

 

[hat]

Should be fine, buy why 1.16v at idle? Did you disable power saving features, or use manual voltage? Try using an offset voltage so it only adds it when required, rather than pushing 1.16v all the time. It won't hurt it, but you're using more voltage than necessary at idle, so you get higher temps and power draw for no reason.

 

[EarthDog]

That is stock or less voltage, so, yes.

Hopefully 1 hour of non AVX P95 your system is stable.

Should be fine, buy why 1.16v at idle?

Typically one dials in on static, then if they want to then use offset. At least, that is how I have always done it (that said, I haven't used an offset in years... windows power management lowers my voltage and clocks. )

 

[valen99]

Should be fine, buy why 1.16v at idle? Did you disable power saving features, or use manual voltage? Try using an offset voltage so it only adds it when required, rather than pushing 1.16v all the time. It won't hurt it, but you're using more voltage than necessary at idle, so you get higher temps and power draw for no reason.

I used manual mode, also i didn't disable any power saving feature like C state or something

That is stock or less voltage, so, yes.

Hopefully 1 hour of non AVX P95 your system is stable.

Typically one dials in on static, then if they want to then use offset. At least, that is how I have always done it (that said, I haven't used an offset in years... windows power management lowers my voltage and clocks. )

The stock voltage for 4.0Ghz at stress where 1.07v.

The system at 1.16v on P95 26.6 (no AVX) survived 1 hour, and at AIDA64 FPU+CPU+Cache survived 2 hours

Also, i dont know why, but at idle the vcore dont drop, that is why im asking if 1.16v is safe for idle.
The windows power plan is not on power mode, and i didn't disable any kind of power saving feature on the bios

 

[EarthDog]

That is a low VID for that CPU then.

It is plenty safe for idle, yep. Its been years since I ran offset to save power.

 

[hat]

Your voltage does not drop at idle because you manually set 1.16v. I dunno what your stock voltage is (you said it reads 1.07 under load, but software readings are often incorrect by some margin, and then there's vdroop and all that)... but let's say 1.07 is the default voltage, you would want an offset of +.09 to reach the same 1.16v under load. If you do this, your voltage should drop with the clock speed when idle.

Side note: your rig may not be fully stable at 1.16v. 1 hour of Prime95 (especially without AVX) is nothing. I don't call my rig stable until it first passes 100 passes of the bootable Linpack Xtreme, and then passes 24 hours Prime95 blend (with AVX). I'll leave it up to you to decide whether or not I'm a nutter for doing that, but that's my procedure. FWIW, I've had my rig crash during Prime95 past some... at least 6 hours in, after surviving Linpack Xtreme. In my experience, with my hardware in particular. Linpack Xtreme seems to be really good at weeding out a bad OC really quick, but it still has a chance to fail a long Prime95 test.

 

[rtwjunkie]

Hello guys, i just bought a new air cooler (A CM MA620p), and decided to overclock from 4.0Ghz to 4.5Ghz. Validation: https://valid.x86.fr/yykw8s

Spoiler

First i tried with 1.25v and everything OK, then started to lower the voltage to 1.20v All OK, but with 1,15v AIDA64 stable (test duration 2 hours, CPU + FPU + cache test) but then i tried PRIME95 26.6 (Smal FFT), at the 9 minutes i got a BSOD, so tested again with 1.16 and 1 hour later, everything was fine.

The temps where:
For stock
MAX CPU Temp: 64c (avarage of 60c)
VRM Max Temp: 51c

For 1.25v
MAX CPU Temp: 87c (average of 85c)
VRM MAX Temp: 58c

For 1.2v
MAX CPU Temp: 87c (average of 82c)
VRM MAX Temp: 56c

For 1.16v
MAX CPU Temp: 80c (average of 78c)
VRM MAX Temp: 54c


So now i just want to know if its safe to leave the 1.16 voltage even at idle for a 24/7 machine.

That voltage is more than fine. I’m running 1.17 and am pleased with that. You are below stock voltage at an overclock. Enjoy!

 

[biffzinker]

A fixed voltage is also way around the CPU increasing voltage when executing AVX2 code. The CPU can and will bump the voltage when using a offset with AVX2 execution. I did a fixed voltage with my 4790K.

Edit: The 4790K still goes through the lower power C-States. Mine would draw between 5-8 watts when idling even with the voltage at 1.16.

 

[Toothless]

You could run that chip at 1.35v and as long as thermals are good it would be fine.

 

[freeagent]

Keep her unner a hunnit and she'll rock you for years

 

[ArbitraryAffection]

yes. below 1.3v is fine for 24/7 up to TJ which is normally 95-105c.