You need so much to game at 1080p so to capture and stream without the usual complaints you need to double up on both CPU and GPU power. The usual 16GB main memory will do and you move to all SSD to kill delays in the storage area.

So the usual is a current i7 and the usual 1080 GPU. To stream you need a premium Internet connection as well.

I have to ask. Are you that good that you have a following and collect revenue from this activity?