CPU or GPU upgrade?
As an architect, my work computer is primarily used for architectural software (Revit, Sketchup, etc.). However, I also do all of our in-house photography, videography, etc. when our buildings are completed. So I use Premiere Pro to edit walk through videos I put together for our projects. My computer has been doing ok with 1080p footage but since I recently switched to shooting in 4k, it just can't keep up (even with proxies). I only get choppy playback in the timeline. I need to know if I can simply upgrade the graphics card to fix the issue or is my CPU so old that it won't really matter and it needs to be upgraded as well? My computer is around 5 years old. Any suggestions would be appreciated.
Specs:
Dell Precision T5810
Intel Xeon CPU E5-1607 v3 @ 3.10GHz
16GB RAM
NVIDIA Quadro K2200 4GB GDDR5