What apps do you "Prefer external GPU" on Macs?
Obviously, I tick the prefer external GPU checkbox on all my graphics, games and video editing apps.
But what about my browser where I watch video media (YouTube, Amazon, Vudu), Apple TV, DVD Player, etc.? I currently have those ticked as well, but my Mini had no problem with them before the eGPU upgrade.
Video media playback relies more on the intel processor and Apple T2 chip for decoding, and less on internal or external GPUs.