@kunthakenthe From what I see, this is a budget build. What you're suggesting would easily put the build over 900USD.
@OP, I edited the build a little bit to make things a tad bit cheaper and slightly better.
Changed the ram to be something cheaper, it'll still work just like the other one you selected, because it has the same CAS and frequency.
Changed the power supply to something of a higher quality for the same price that i saw. (64.99, if there was a MIR, then it would change things slightly).
Changed the hard drive to a WD hard drive which is more reliable than the seagate.
Change the gpu to an r9 260x which is slightly better than the 650 that you had on the list.
You'll still need windows, but I didn't include it in this...