Arne Saknussemm wrote:
You'll have to look at temperature as a factor too how long is the render and what cooling do you have? Is the VRM actively cooled?

Thanks, Arne.

The render process has only been active for 5 min. Temps are totally fine around 50s not nearly hitting max like in Prime95.

By VRM you mean memory? I have 64 GB G.Skill Ripjaws 4 which are simply cooled by 4 case fans airflow. They run at 2.800 MHz. Honestly, I don't know how to check their temps.

*Personally, I'd really like to run the 4,4 GHz constantly. Might lower the GPU overclock help stabilize CPU?

First of all, we need to know a lot more from your setup (not only your processor), i.e. how much RAM, SSD or HDD, Raid or no-Raid, cooling (most important) and the Premiere project itself (what are you doing, are filters used etc.). Do you use GPU-Acceleration in Premiere? Also interesting, would be your overclocking settings i.e. voltage, ram-speed etc.

Adobe CC is not very buggy, it is just not well optimized for multi-cpu rendering. Many tasks in Premiere are single threaded only, i.e. stabilizing footage, most of the filters etc. , so it can be normal that CPU load drops to 1-2%. Another reason could be slow harddisks, not enough RAM etc.

You could try to render the project without overclocking and take a close look at how the CPU behaves then. Raising the voltage will generate more heat and if you dont have proper cooling, it will likely getting worse and not better.

As you see, there are a lot factors, why your CPU drops to 1-2% and we need way more info, if you want good advices.

Arne Saknussemm wrote:
VRM is the voltage regulation at top of board...has a heat sink on it...wise to actively cool this if you are OCing...

I will check temps on HWmonitor. What is max temp for VRM?*

I run a Asus X99-A II which is think is got quite good cooling.