Is a Radeon RX 570 good for streaming?
Reputable. So long as the rx 570 is working, you can stream on it. You can stream on an antique HD6670 card or you can stream on an APU chip that has the graphics built in.
Is AMD good for streaming?
AMD's Ryzen 3200G would be a fantastic choice for a streaming PC. Its four cores and ability to boost up to 4.0GHz when needed makes it a great chip for such a task.
Is RX570 4GB good for streaming?
If the RX 570 4GB is what you can afford, that is fine. The GTX 1060 would be an upgrade. Operating with just 8GB of RAM is not a good idea if you are using the integrated graphics.
Is RX 570 4GB good for streaming?
If you are playing games at a high level with high end components, then yes 8GB or 12GB of VRAM makes sense. Otherwise you can get by without it. If the RX 570 4GB is what you can afford, that is fine. The GTX 1060 would be an upgrade.