I think I'll buy a new graphics card and more RAM anyway.First, do you have any game controllers plugged in? I see this all the time when I have the PS3 controller plugged in, and sometimes when I have the PS4 controller plugged in. (Not always on the PS4, I'm assuming because of updated drivers for Win10.)
Second, you are at entry-level specs there. Pretty much the minimum recommended. What are your game settings at? An overloaded system bus will create additional latency.