Can my PC handle a GTX 750TI??

I have an i3 2100 with 8gb of ram. I'm using an msi gtx 750 oc version and the performance is enough for me. I believe your i5 and 750 ti would work quite well.

I just don't know if you will fit it in that case. Plus, correct me if I'm wrong, you only have a 220 watt PSU on that one.
 

yeah, my psu is only 220w, how does it exactly affect the performance, though?
(i'm kinda new to this)
 

the thing is that i'm from India, and every electronic device here is limited to 220w
 

oh yeah, my bad, 🙁
so how do i find out my psu?