The HD 5450 is pretty old and not all that great by today's standards. Anything "below" the GT 730 is not a good spend... It would be best to wait until you can spend more on a better GPU.
http://www.grabmore.in/products/31307327/EVGA-GeForce-GT-730-1GB-GDDR3-64-bit-DVIHMDIVGA-Low-Profile-Graphics-Card-01G-P3-1731-KR.html