So I built a PC for my cousin using old parts from my build and buying some new parts as well. I bought him a ryzen 2700x cpu because he was interested in streaming. He is telling me that his framerate and video quality is very bad whenever he tries to stream. Now i know that usually streaming issues point towards the cpu but considering i have seen benchmarks that show the 2700x outperforming an i7 8700k at 1080p i find it hard to believe that it is the reason he can't stream fortnite, so I'm wondering if the problem is the Gpu which is a radeon r9 390x with 8gb of VRAM. I know absolutely nothing about streaming so any help would be appreciated.