Hello,
It really depends on what type of games you want to play... But generally, no, those parts will not make a very good gaming PC:
The I3 CPU isn't so bad, you can survive without an I5.
You really want to have 8GB RAM at least for gaming nowadays.
I assume that 'Chasis' is a 'Case + Power supply combo'...? I've just checked the Tom's Hardware PSU tier list, and using CTRL+F I found SUPERCASE from Apex under Tier 5. This means that your PSU is unsafe, as quoted here:
"Tier Five
Avoid IMMEDIATELY. These units are highly unsafe to use. No such protections added, very thin gauge wiring used, false advertising and too much to list. Reference to a higher tiered unit for a better, money saving and a much safer unit. For your safety's sake, please don't order or pick one up for use in your system. These units are a potential fire hazard and could even kill you, let alone your system."
Finally, the GTX 750 is getting quite outdated now and will struggle to cope with new games even at low settings, though it is possible.
If you could tell me your budget, tell me exactly what components you need (also say if you need a monitor, mouse, keyboard, operating system), and tell me what games you want to play, I will try to build the best PC I can, for you.