That won't help at all for any game near modern day, but I guess could help a tiny. What is your power supply? I doubt you need a new one, and I recommend you just get a GT 710; it's weak for modern day games, but this machine won't be able to run modern day games anyway. The GT 710 is actually capable of running modern day games on low settings, but your CPU is too weak.
The GT 710 is a bit below Intel's current graphics.