my advice is if you are not going for a high end VGA get normal 450w or 500w
if you are planing to buy good gaming VGA later then don't wast money on rs 2000 psus get a good PSU... you can try redline technologies @MC for good psus for under 5k
extream powe plus ganna epa..gannawa nam GX series eka ganna....
http://online.barclays.lk/bc/itemdesc.asp?ic=14217&eq=&Tp=
uba pci e power oone vga ekak danne nathnam normal ekak ganin