overclocking CPU issue - getting stutter under full load

[lilkooch]

So I had a question on overclocking my CPU.  I have overclocked my i7-6700k to 4.6 at 1.32 volts and when running Intel Extreme Tuning Utility my corsair LL LED case fans seem to stutter on the color shift.  Also, when moving my mouse and/or program windows, there seem to be a slight stutter sometimes during the test.  No blue screen or full system freeze, just the stuttering.  Is this a sign of an unstable overclock or normal since the CPU is under full load.  Just trying to see if i need to give it a little more voltage or not.   

[COUPER MILLAR]

That would be my assumption. Before you push more voltage what do your temps look like and what cooling solution are you using?

 

[lilkooch]

Just now, COUPER MILLAR said:

That would be my assumption. Before you push more voltage what do your temps look like and what cooling solution are you using?

 

I am using the Corsair H150i pro and if I remember right i am peaking around 70 C (might have hit 72) at full load.  (at work currently and trying to remember what the results were this morning when I ran the utility)

[COUPER MILLAR]

That is a good cooler, how long did you run the benchmark before checking temps? AIO's take about 15 to 30 minutes to come to peak temperature which can lead to falsely low temps if you don't run your system long enough. If you did run the test long enough you technically have a bit more headroom to add voltage, but personally I wouldn't in order to keep temps lower (Running my 5820k at 4.3ghz 1.27v running  62 C load)

[lilkooch]

1 minute ago, COUPER MILLAR said:

That is a good cooler, how long did you run the benchmark before checking temps? AIO's take about 15 to 30 minutes to come to peak temperature which can lead to falsely low temps if you don't run your system long enough. If you did run the test long enough you technically have a bit more headroom to add voltage, but personally I wouldn't in order to keep temps lower (Running my 5820k at 4.3ghz 1.27v running  62 C load)

When i ran it this morning it was a 15 min test.  When I get home from work today I will run it longer ( 30 to a hour) to see what figures I get.  If these figures are correct and I continue to experience the stuttering, you believe it is unstable and options are to lower the multiplier or push the voltage up a little? 

[COUPER MILLAR]

Exactly. Due to water having such a high specific heat it takes some time to completely saturate any cooling solution that uses water. An hour would be overkill. I would just run the test again when you get home and watch the temps, If they don't continue to rise after 15 minutes you should be able to call it good. If they keep going up keep running the test until you seen them hold steady for a couple minutes. The nice thing is that once you have gotten your system up to temp it should take less time to fully saturate your cooling on subsequent test runs. 

 

As far as stability is concerned, try a voltage bump to say 1.35 to see if that fixes your issue. If it does and your comfortable with temps you could try and push the clocks higher. If that doesn't fix the stuttering I would drop down to 4.5 and see how low you can push voltage while staying stable to help decrease overall system temps. 

 

Best of luck! 

[lilkooch]

9 hours ago, COUPER MILLAR said:

Exactly. Due to water having such a high specific heat it takes some time to completely saturate any cooling solution that uses water. An hour would be overkill. I would just run the test again when you get home and watch the temps, If they don't continue to rise after 15 minutes you should be able to call it good. If they keep going up keep running the test until you seen them hold steady for a couple minutes. The nice thing is that once you have gotten your system up to temp it should take less time to fully saturate your cooling on subsequent test runs. 

 

As far as stability is concerned, try a voltage bump to say 1.35 to see if that fixes your issue. If it does and your comfortable with temps you could try and push the clocks higher. If that doesn't fix the stuttering I would drop down to 4.5 and see how low you can push voltage while staying stable to help decrease overall system temps. 

 

Best of luck! 

Thanks for the tip.  Sadly I am getting the same results when I even go back to stock settings on the CPU.  When running any type of stress test I am getting the screen stutter.  When stressing at 4.6ghz and 1.35volts i hit 75C max temp after running a 30 min stress test using the IEU.  Since it occurred and was doing it each time i adjusted the voltage and ratio, i figured just go back to stock and it did it again.  Nothing ever freezes totally and doesnt blue screen, i just get a 2 sec freeze.stutter.  Any ideas now?  Not sure if it could be anything besides the CPU causing the issue. 

[COUPER MILLAR]

Next culprit would be the GPU. Is it overclocked at all?

[mxk]

1 hour ago, COUPER MILLAR said:

Next culprit would be the GPU. Is it overclocked at all?

Yup, agreed^. What's your GPU, and like COUPAR MILLAR said, is it overclocked?

[lilkooch]

8 hours ago, COUPER MILLAR said:

Next culprit would be the GPU. Is it overclocked at all?

I am using the RTX 2080 ti FE and the only overclocking that I did what push up the power and temp limits in afterburner.  Along with pushing these up, I did do a custom fan curve so I can increase the fan speed over the 41% stock speed that Nvidia set it at stock.  When gaming and benchmarking the GPU, temps hit around 72-75C (I might have hit 78C once in shadows of the tomb raider).  In unigine superposition, temps hit around 75C and my score is around a 12300.  

 

I am using a new cablemod vertical GPU bracket.. not sure if that could be the culprit.  A few additional things, ran memtest86 last night and everything passed and when I turned on my monitor this morning before leaving work the LL series RGB fans did the whole color freeze for a split second then was fine, not sure if that help determine if it is the GPU.

[COUPER MILLAR]

The bracket wouldn't cause any of these issues. At this point I would personally go nuclear and do a clean install of windows and all my drivers and see if that fixes the issue. Less extreme options would be to find another gpu to try in your system as well as trying your current gpu in another system to see if these problems continue. However with both the system and the fan lights stuttering I feel like this is a driver/os stability issue thus my nuclear recommendation. A bios update might also be an option, however I'm always more cautions of this option on boards that don't have multiple bios chips to revert to if something goes wrong. 

[lilkooch]

7 minutes ago, COUPER MILLAR said:

The bracket wouldn't cause any of these issues. At this point I would personally go nuclear and do a clean install of windows and all my drivers and see if that fixes the issue. Less extreme options would be to find another gpu to try in your system as well as trying your current gpu in another system to see if these problems continue. However with both the system and the fan lights stuttering I feel like this is a driver/os stability issue thus my nuclear recommendation. A bios update might also be an option, however I'm always more cautions of this option on boards that don't have multiple bios chips to revert to if something goes wrong. 

thanks!  I am going to remove the bracket and plug the GPU into the motherboard directly and see.  If it still does it, fresh install i go!  I will keep you posted.  Thank you so much for all the help!

[lilkooch]

On 12/5/2018 at 12:31 PM, COUPER MILLAR said:

The bracket wouldn't cause any of these issues. At this point I would personally go nuclear and do a clean install of windows and all my drivers and see if that fixes the issue. Less extreme options would be to find another gpu to try in your system as well as trying your current gpu in another system to see if these problems continue. However with both the system and the fan lights stuttering I feel like this is a driver/os stability issue thus my nuclear recommendation. A bios update might also be an option, however I'm always more cautions of this option on boards that don't have multiple bios chips to revert to if something goes wrong. 

So.. no luck when plugging the GPU into the motherboard so fresh install I went.  Funny thing... After install of windows 10, ran stress test and problem seemed to be gone.  Started loading games and what not back onto the computer and after loading Corsairs iCUE software onto the computer and setting the fans up to the rainbow setting.. ran the stress tests and stuttering/freezing came back.  closed out iCUE software and ran the stress test and it was clean.  Opened iCUE and back came the stuttering.  So question I have and want to make sure I am right in thinking... is iCUE causing the issue when the CPU is under full load? Could it have been that easy to start?  I mean I even went down the path of shutting down cores in the BIOS to see if it was a bad core.  I even went stick by stick in different slots for the RAM to see if it was a motherboard or RAM issue.  Thoughts? 

[COUPER MILLAR]

Sounds like some random issue with iCUE at this point. You could try finding a previous version and see if that resolves the issue. If that does fix things I would recommend contacting corsair about it and get a trouble ticket in. 

[Turtle Rig]

Yes let him bump it temporarily to 1.35ish v.  If same thing happening its not that so make sure to set it back to what it was.