A:Answer in my honest opinion this system isnt made for streaming,. you want one with more memory and PCIe options, if you want to stream and play in HD 1080P.
For one, you are going to need a capture card to stream your game in HD and there isnt really room for it on the mobo.
Second, you are limited to 32GB ram on this machine and should probably shoot for 64 on your streaming box.
You can TRY it if you want but given that there are new CPU and GPU releases coming in weeks, i would hold off on buying anything and seeing what is available in the new stuff, and also current hardware at these prices will drop.