There are several problems with your current hardware and software configuration:
- Your CPU does not have a QuickSync hardware encoder at all whatsoever. None of the F or KF CPUs have QuickSync support at all. That means that Intel had permanently disabled the integrated GPU (which is required for QuickSync hardware acceleration support) during the manufacture of the F and KF CPUs.
- You have the very first version of Premiere Pro 14.0. And all versions of Premiere Pro from the 12.1 version of 2018 all the way to and including the 14.1 version of early 2020 support only the Intel QuickSync for hardware encoding. So if you do not have an Intel CPU with integrated on-CPU Intel HD, UHD or Iris Graphics both present and enabled, then you are semi-permanently stuck with software-only encoding until you update your Premiere Pro to version 14.2 or later (and only then will Premiere Pro utilize the discrete GPU for encoding).
- Finally, the i5-9400 (both with and without the "F") is a weakling of a CPU by current standards. In fact, it is actually weaker in thread-intensive productivity apps than even a quad-core 7th-Gen i7-7700 (non-K) CPU. That makes the RTX 2060 quite a bit overqualified for your CPU. That CPU does not deserve a GPU that's any higher-end than a non-Super GTX 1660 for a balanced performance between the CPU and the GPU.
Put them all together, and you have fallen into the trap many gaming PC builders fall into: Go too heavy on the GPU but too weak of a CPU. Remember, CUDA apps work far differently from gaming. A higher-end GPU in CUDA apps rely heavily on the CPU performance just to keep up.
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