I have an external GPU for my laptop. I added this to speed up rendering video files in Adobe Premiere Pro, once I started working with H.265 HEVC about a year ago. It made a huge improvement in the time rendering files when doing export media in Adobe Premiere Pro. My system: Lenovo Yoga 920-131Kb, 16 GB Ram, Intel i7-8550U, CPU 1.80 GHz - 1.99 GHz, Quad Core, x-64 bit processor. Internal GPU is on the motherboard. Intel UHD Graphics 620.  EGPU is  Aorus Gaming Box with NVIDIA 1080 GTX graphics