i7 8700k default voltage high

[D3adR4t]

Hey guys,

So I recently upgraded to i7 8700k and the first thing I have notice that the voltage with default bios settings goes up to 1.35v when under load @4.7ghz. Is this considered normal or too high for stock settings? is their any way to lower the voltage. I'm still a noob when it comes to OC lol.

 

[Sola Scriptura]

@D3adR4t intel 8700K settings | Smack talk

1.35 is most def too high man, are you using enhanced core overclocking mode? the mode that boosts all the cores to 4.7GHz?

 

[D3adR4t]

@D3adR4t intel 8700K settings | Smack talk

1.35 is most def too high man, are you using enhanced core overclocking mode? the mode that boosts all the cores to 4.7GHz?

Yeah everything on default with enhanced multicore on gigabyte motherboard enabled which keeps all cores at 4.7ghz but even with it disabled the voltage still hovers in the 1.3 range on full load

 

[Sola Scriptura]

Yeah everything on default with enhanced multicore on gigabyte motherboard enabled which keeps all cores at 4.7ghz but even with it disabled the voltage still hovers in the 1.3 range on full load

what do you use to put the cpu under full load? post some pics off your bios settings if you can.
If you want lower vcore and better thermals you will have to do a manual OC.

Look for these two settings, vcore and LLC (load line calibration) in your bios power settings. also see if you can set your power mode to over ride. post sceenshots and post your findings here.

 

[D3adR4t]

seems like it was enhanced multi core performance which enable all cores to run at 4.7ghz. but does this mean that i have a bad overclocking CPU? as it needs around 1.35 for 4.7ghz or does the motherboard over volt to ensure stability.

 

[Gouhan]

You can set a fixed VCore and also depending on the board, the voltage reading could be very far from the actual CPU voltage.
4.7GHz should be doable at 1.25V just fine, even 1.2V. (Set this manually and set LLC to Medium or Standard). If this works then it's a board issue (reporting error perhaps or real voltage is high).

It's also possible you just have a CPU that needs 1.35V for 4.7GHz all cores. As there are some CPUs with this as the default VID

 

[Sola Scriptura]

seems like it was enhanced multi core performance which enable all cores to run at 4.7ghz. but does this mean that i have a bad overclocking CPU? as it needs around 1.35 for 4.7ghz or does the motherboard over volt to ensure stability.

try vcore at 1.25 and LLC at mid or standard as @Gouhan recommended, tests for stability and chek if you can then lower it, just repeat the process of testing for stability.

 

[jonathankru]

My 8700k @ 4.7Ghz all core load also wanted like 1.32v on Auto. After some testing it turns out mine needs about 1.25V for 4.7Ghz to be stable. So i decided to rather lower the speed a little to be able to lower the voltage. ended up with 4.6Ghz @ 1.15V which isn't amazing but I think it lowers the stress on the cpu and i don`t think you will "feel" 100mhz loss in normal gaming and PC usage.

CPU lottery....

 

[Sola Scriptura]

My 8700k @ 4.7Ghz all core load also wanted like 1.32v on Auto. After some testing it turns out mine needs about 1.25V for 4.7Ghz to be stable. So i decided to rather lower the speed a little to be able to lower the voltage. ended up with 4.6Ghz @ 1.15V which isn't amazing but I think it lowers the stress on the cpu and i don`t think you will "feel" 100mhz loss in normal gaming and PC usage.

CPU lottery....

for me it does not make sense not OCing a K cpu heehee but whatever works for the end user.

 

[jonathankru]

I have my CPU and GPU on the same water loop and i like my PC to be quiet. So it is about finding the happy ground of speed and noise for me and i think you would be hard pressed to "Feel" the difference between 4.6Ghz and 4.8Ghz without the use of benchmarks. But yes each to there own. I like to see how far a CPU can go and have done 5.0Ghz with my CPU but for 24/7 use i don`t see the point. LOL. If i could get my CPU to 4.7Ghz @ 1.2v i would have settled on that .

 

[Sola Scriptura]

I have my CPU and GPU on the same water loop and i like my PC to be quiet. So it is about finding the happy ground of speed and noise for me and i think you would be hard pressed to "Feel" the difference between 4.6Ghz and 4.8Ghz without the use of benchmarks. But yes each to there own. I like to see how far a CPU can go and have done 5.0Ghz with my CPU but for 24/7 use i don`t see the point. LOL. If i could get my CPU to 4.7Ghz @ 1.2v i would have settled on that .

makes sense I actually feel a difference, but I do not game at all, have no games on my system, only do productivity.

 

[jonathankru]

If it was my "work" machine then I would 100% agree with you. But then you need to know that it is stable. I automatically assumed it was for gaming. lol

makes sense I actually feel a difference, but I do not game at all, have no games on my system, only do productivity.

 

[D3adR4t]

Thanks for the feedback guys will do some testing today and report back. Will first try with manual voltage on 1.25v

 

[Sola Scriptura]

Thanks for the feedback guys will do some testing today and report back. Will first try with manual voltage on 1.25v

how did the testing go?

 

[D3adR4t]

how did the testing go?

Hey man, I think I got it stable at 4.8ghz 1.28v. Ran It for about an hour with prime and no bsod/ crashes. But one thing I have noticed is that with xmp enable, I get random BSOD's and system crashes even while idling. But with xmp disabled or at stock, my setup runs perfectly stable.

 

[Sola Scriptura]

Hey man, I think I got it stable at 4.8ghz 1.28v. Ran It for about an hour with prime and no bsod/ crashes. But one thing I have noticed is that with xmp enable, I get random BSOD's and system crashes even while idling. But with xmp disabled or at stock, my setup runs perfectly stable.

sweet dude! what is your rams voltage with xmp? just enter everything manually and then try and increase your ram voltage, eg say it is at 1.2v increase it to 1.3v - also try using OCCT to test for system stabilty - OCCT wont bsod your system it will just stop when it detects system instability.
use CPU:OCCT and set test mode to Small Data Set, run for at least 40mins or more - you can set the test mode to large data set to test more RAM.
I use CPU: Linpack and set memory to 90% and un-tick AVX - unless you want to test for AVX as well.

 

[D3adR4t]

sweet dude! what is your rams voltage with xmp? just enter everything manually and then try and increase your ram voltage, eg say it is at 1.2v increase it to 1.3v - also try using OCCT to test for system stabilty - OCCT wont bsod your system it will just stop when it detects system instability.
use CPU:OCCT and set test mode to Small Data Set, run for at least 40mins or more - you can set the test mode to large data set to test more RAM.
I use CPU: Linpack and set memory to 90% and un-tick AVX - unless you want to test for AVX as well.

Thanks will try tonight to bump up the memory voltage and see if it runs stable. Will definitely try OCCT. Seems like prime is cooking my cpu

 

[Sola Scriptura]

Thanks will try tonight to bump up the memory voltage and see if it runs stable. Will definitely try OCCT. Seems like prime is cooking my cpu

If you are using a prime version later than 26.6 it will cook your cpu as it is using AVX. hence why I use AVX offset, then my cpu runs at a lower clock speed when using AVX instruction set.

 

[CRE4MPIE]

You can set a fixed VCore and also depending on the board, the voltage reading could be very far from the actual CPU voltage.
4.7GHz should be doable at 1.25V just fine, even 1.2V. (Set this manually and set LLC to Medium or Standard). If this works then it's a board issue (reporting error perhaps or real voltage is high).

It's also possible you just have a CPU that needs 1.35V for 4.7GHz all cores. As there are some CPUs with this as the default VID

Not all silicone is equal - you should know this

My chip needs 1.35v for 5Ghz @ all cores 0 AVX offset, cache ratio 50 ). Anything less It's BSOD city.

 

[Sola Scriptura]

Got a new cooler so I OCd a bit more. 5GHz at 1.27v
AVX -3

 

[Sola Scriptura]

Not all silicone is equal - you should know this

My chip needs 1.35v for 5Ghz @ all cores 0 AVX offset, cache ratio 50 ). Anything less It's BSOD city.

that seems decent, with AVX at 0 I will not complain at all!

compare it to this chip - it has been delidded, but still, it uses 1.4V @5GHz with AVX -2