GPU or CPU to stream?

I want to stream Apex Legends to Twitch. Should I use my GPU (GTX 1060 3GB) or my CPU (i5-7400)?

About the GPU via NVENC (new) is better on a 1060 than on the CPU.

Thanks, and should I take there 1080p, or 900p / 720 60fps? Unfortunately have only an upload speed of 10mb / s: |

With an upload of 10mbit you should rather choose the 900p version with 60 pictures there's the maximum load at 10.5mbit in the average is the utilization at 8-9mbit.

if you still want some air then Griffin for 720p variant this is a maximum of 8mbit.

10 mb / s is enough to stream. Twitch has a maximum bitrate of 6000 (if this is really the maximum, only twitch knows) but with this rate you can definitely stream 1080p.

https://stream.twitch.tv/encoding/

On 1080p with 60 images is not possible at 4.5 to 6mbit I have experienced myself when I pull the stream it partly over 10mbit and everything under it looks blurry.

That's why I just suggested it from my own experience.