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Problems with i5 6600k overclocking

jbergisss
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Hello.
I have a problem with overclocking my 6600k.
So i have set multiplier to 45 and it runs on 4.5Ghz and my vcore on 1.35V but when i start to stress test it my voltage sometimes drops to 1.296V and frequency to 3,8Ghz. 
Here is a video of my problem: https://youtu.be/SYTGhMf6MXk
What could be the cause of this?

Specs

MB: Msi z170a gaming pro
CPU: i5 6600k
Cooler: corsair H100i GTX
Psu: evga 550GS 
Ram: 8gb hyperx
Gpu: Asus gtx 970

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https://linustechtips.com/topic/663391-problems-with-i5-6600k-overclocking/
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Temps?

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Just now, jbergisss said:

70c is highest i have seen

During stress testing?

What software do you use to monitor temps?

NEW PC build: Blank Heaven   minimalist white and black PC     Old S340 build log "White Heaven"        The "LIGHTCANON" flashlight build log        Project AntiRoll (prototype)        Custom speaker project

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Ryzen 3950X | AMD Vega Frontier Edition | ASUS X570 Pro WS | Corsair Vengeance LPX 64GB | NZXT H500 | Seasonic Prime Fanless TX-700 | Custom loop | Coolermaster SK630 White | Logitech MX Master 2S | Samsung 980 Pro 1TB + 970 Pro 512GB | Samsung 58" 4k TV | Scarlett 2i4 | 2x AT2020

 

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Do you have dynamic frequency control enabled or something that does a similar thing?

26 minutes ago, jbergisss said:

Hello.
I have a problem with overclocking my 6600k.
So i have set multiplier to 45 and it runs on 4.5Ghz and my vcore on 1.35V but when i start to stress test it my voltage sometimes drops to 1.296V and frequency to 3,8Ghz. 
Here is a video of my problem: https://youtu.be/SYTGhMf6MXk
What could be the cause of this?

Specs

MB: Msi z170a gaming pro
CPU: i5 6600k
Cooler: corsair H100i GTX
Psu: evga 550GS 
Ram: 8gb hyperx
Gpu: Asus gtx 970

 

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I am no expert, but looks like the stress test app is allowing some other application to utilize the cpu from time to time. Have you tried prime 95? and it maybe better to use hwinfo instead of hwmonitor - in my case, hwmonitor gave out a very very different reading from the actual Vcore (as measured using a DMM).

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