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  1. #1
    ROG Enthusiast Array metal.snake's Avatar
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    Does Prime95 torture test is relevant for 7700K OC ?

    Hello, Does Prime95 torture test is relevant for 7700K OC ? I'm asking because this cpu get's heated real quick.. and very high temps.
    When gaming, i'm not going more than 87 celcius on the heaviest game with 50.5 ghz and 1.3v vcore set manually on bios. Also on Firestrike 10 min stress test.
    But, If I just start prime95 torture test, instantly I get on some cores 95 celcius and even 100...

    Is it still relevant?

  2. #2
    ROG Enthusiast Array metal.snake's Avatar
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    Update: I'm able to 1.28V Vcore with 5044 Ghz overclock.. I think I might have hit a golden cpu chip you can say. Tell me if i'm wrong.

    Temps now with prime torture test maximum that i've seen on one of the cores was only 93 celcius.

    thoughts?

  3. #3
    ROG Guru: Grand Master Array
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    I personally prefer ROG Realbench.

    But if frying eggs on your CPU is your goal, Prime95 is pretty good at that. lol

  4. #4
    ROG Enthusiast Array metal.snake's Avatar
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    Quote Originally Posted by Chino View Post
    I personally prefer ROG Realbench.

    But if frying eggs on your CPU is your goal, Prime95 is pretty good at that. lol
    So that means Prime95 is not relavent?

    Ok, I will try Realbench. Downloading it now.

  5. #5
    ROG Enthusiast Array metal.snake's Avatar
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    With ROG Realbench the temps are even higher with stress testing

    I got Kraken X61 AIO water cooler, dosent really seem to do the job.. im at 5Ghz oc with 1.29V Vcore set manually and it's still running super hot and can reach 95 celcius if not more on stress test..

    What can be possibly wrong? My CPU is not overclocking good? or?

  6. #6
    ROG Guru: Blue Belt Array jab383 PC Specs
    jab383 PC Specs
    Motherboard24/7 rig : Maximus VI Extreme
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    The prime 95 test is not relevant at all for me. It's all torture and no test. Other tests work better - confirm stability better in less time. Realbench has realworld workloads and is actually quite easy on the CPU. The difficulty is that many competitive overclocking benchmarks are more stringent and an overclock that passes Realbench can fail with harder tests.

    OCCT is a more stringent stability test and the results of the processing are checked so that errors are caught, not just depending on the system to crash. An OCCT test of 3-5 minutes is a better stability indicator than days of Prime 95.


    As for your rig: 5GHZ and 1.29volts is an EXCELLENT overclock. If you're reaching 95C in realbench at 1.29 Vcore, the difficulty is with the cooling. Check these:
    Is the X61 water pump running? There should be some vibration, but not much noise.
    Is the cooler snugly pressed against the CPU. Even pressure on the mounts is important.
    Is the thermal interface material spread? What TIM are you using? The cooler may have to be lifted to check for even application and spread of the TIM.

    If all that is proper, temperature may become the limiting factor to the overclocking ... unless you're serious enough to consider delidding the CPU and replacing the internal TIM. That's a big step, is risky and voids the CPU warranty. A drop of 25C at high power is not unknown from the delidding.

  7. #7
    Moderator Array Nate152 PC Specs
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    Hi metal.snake

    The i7-7700k does run hot but your temps do seem a little high for the voltage you're using, you could try remounting the water block and repasting the cpu with a good quality TIM such as Thermal Grizzly Kryonaut.

    I do have a better cooler with the Koolance ERM-2K3U.

    See the maximums I have circled in red and the vcore underlined, this is with the Realbench benchmark.

    Click image for larger version. 

Name:	Realbench 5.0GHz.png 
Views:	23 
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ID:	63910

  8. #8
    ROG 師傅 Array Arne Saknussemm PC Specs
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    At 1.3v for 5GHZ you should be getting temps around 70 to 75 degrees for a short stress test...assuming ambient around 24...

    If you are running hours then you will heat saturate and higher temps will be possible...

    If that is short stress testing you definitely need to review the mount or contact and/or see if the cooler is functioning properly...flow etc.

  9. #9
    ROG Guru: Diamond Belt Array Zka17's Avatar
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    Quote Originally Posted by metal.snake View Post
    maximum that i've seen on one of the cores was only 93 celcius.
    "only" 93?! Even 87C while gaming... Nah, your temps are way out of my comfort zone! Just simply not healthy for silicone...

    As suggested by others, check your cooling, read about how you can obtain better cooling on that CPU... but first of all: reduce the frequency and voltages for the setup you have now!

  10. #10
    ROG Enthusiast Array metal.snake's Avatar
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    Quote Originally Posted by Nate152 View Post
    Hi metal.snake

    The i7-7700k does run hot but your temps do seem a little high for the voltage you're using, you could try remounting the water block and repasting the cpu with a good quality TIM such as Thermal Grizzly Kryonaut.

    I do have a better cooler than you with the Koolance ERM-2K3U.

    See the maximums I have circled in red and the vcore underlined, this is with the Realbench benchmark.

    Click image for larger version. 

Name:	Realbench 5.0GHz.png 
Views:	23 
Size:	222.1 KB 
ID:	63910
    It's funny that you mentioned, I did use the Thermal Grizzly Kryonaut TIM on the cpu.. As for deliddin - I didn't yet, planning in the future.

    I'll try to remount the cooler and such.. How do you, personally, put your Kryonaut TIM? Do you spread it manually all over the CPU or you just put a little drop in the middle?

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