I don't know bro, doesn't seem worth it.
I am not sure what you are streaming, how fast the game is etc, but if you are going to stream then you will be doing it for the audience right!? and you wouldn't want it to lag.
GTX 750ti is a bonus, but I'd still say that you game and stream off 1 solid PC setup, or take a look at a decent dedicated setup.
https://vlogginghero.com/shroud-stream-setup-gaming/ (shroud has a mean setup).
Best bet is actually just testing it out. Blast out the fastest game you can, archive it so you can watch it, and if it doesn't work well, then go shopping. :)