PC Configuration for editing 1080p (max lenght 20 minute)

"if you are exporting to 1080p, you ideally want the highest frequency six core CPU if possible. A higher core count shouldn't hurt anything (unless you have two physical CPUs), but it makes no sense to get a CPU with a higher core count if it means making any sort of a sacrifice in terms of operating frequency."

https://www.pugetsystems.com/labs/articles/Adobe-Premiere-Pro-CC-2015-Multi-Core-Performance-Update1-806/#Exportingto108…

entry: Intel Core i7 6850K 3.6GHz (3.7-4.0GHz Turbo) Six Core

https://www.pugetsystems.com/labs/articles/Adobe-Premiere-Pro-CC-2015-3-CPU-Comparison-849/#Conclusion

with a PCie 4x NVME drive like a 950/960 pro for media cache/project

a 850 pro for OS/page file

a WD 7200 5 TB media storage

32 GB ram

1060/1070GTX or if not using premiere's accelerated effects, the 1050GTX for a budget build.

what does cuda accelerate?

CUDA, OpenCL, Mercury Playback Engine, and Adobe Premiere Pro | Creative Cloud blog by Adobe

and finally,

you may want to wait till january for the new kaby lake 4 core which is clocked higher than broadwell so may possibly be faster for a cheaper price as premiere prefers higher clock speed over cores.(unless they release a massive optimization code update, which I doubt)

There is a separate hardware forum that is a good source of information.

Hardware Forum