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Why is my 6700K CPU's speed lowering to 1.75ghz under load?

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Joined
14 Sep 2014
Posts
134
I have a 6700K (not overclocked) with Corsair H55 water cooling and, when I render a video, the CPU speed drops to 1.75Ghz after a couple of minutes. It will render at full 4Ghz then drop to 1.75Ghz and bounce back up again to 4Ghz. I checked the CPU temperature using HWMonitor and it doesn't go over 55c

I have tried re-applying the thermal paste but it didn't. I reset and updated the BIOS and it still didn't help. I tried using a Cooler Master Hyper 212 EVO Fan CPU cooler and it still didn't help.



What could be causing this?

This is my PC specs:

CPU: intel 6700k (not overclocked)
Motherboard: Gigabyte GA-B150N Phoenix-WIFI Mini ITX
Thermal paste remover: Arctic Silver ArctiClean Thermal Material Cleanser (60 ml)
Thermal Paste: ARCTIC MX-2
RAM: HyperX16GB (2X8GB)
GPU: Zotac Nividia 1060 6GB Mini (Not Overclocked)
SSD: Samsung 850 Evo 128GB
HDD: Toshiba 2TB HDD
PSU: Be quiet! Pure Power 10 600W
 
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