That Intel I3 Is Not Going To Perform The Best For Todays Demanding Games Like GTA 5 Or Witcher
I highly suggest you purchase either an Intel i5 or buy a different case . I feel that the case is going to be very limiting here as it is very small , meaning it won't provide enough airflow for the graphics card and processor . If you want a cheap case that looks good then the nzxt s340 is great .
Overall I recommend that you look into purchasing a new case.Micro ATX/ ATX Also consider AMD . They aren't bad , they have pretty good value for processors . Basically : New Case / Fx 6300