Hello, right now in my system, I have a i7-4770S and a gtx 760 192 bit. I noticed that in games, my cpu usage will be low while my gpu is always 100%. Someone told me that I need to upgrade my gpu. I did some research and was thinking about getting this gpu and this power supply with it because right now I only have a 450w one. Would this be a good cpu and gpu pair? I also stream, but can't stream the most intense games because it lags really bad, so I'm hoping this will help with that also. Thank you in advance.