This message was posted on behalf of Intel Corporation
The latest graphics versions are 520, 530, Iris™ Pro 540 and 580 available on 6th gen processors.
Now, the graphics performance depends of the quality of the video cables, how many monitors are connected to the computer at the same time and the maximum resolution supported per type of video port is different.
In your case (video streaming) the speed of your network connection is very important as well the amount of memory (RAM) available in the computer.
Please send me your system configuration, brand name and model of the hardware, video software that you are using.