what games are you trying to play? and you didnt mention a graphics card in there, so i assume you dont have one. if you're trying to play on the onboard graphics, thats why its freezing. theyre not made for gaming really.
What games are you trying with? Is this happening with any game you try? What about watching videos and such? When it freezes, is your computer just very slow, does it recover, or is it completely frozen and you have to perform a hard shutdown?
Yeah those games will require a discrete graphics card. I have a decent system with a decent graphics card and it didnt even play blacklight very well. I would suggest saving money for a graphics card and taking it easy on the games until then to not damage your components