|Almost all PSUs available in India are junk. |
Motherboard doesn't draw much power. The CPU draws 65W max. Most of that will come from the +12V rail. That comes out to about 5.5A@12V.
The graphics card can draw quite a bit of power. Again, most off the +12V rail. So you need to choose a card.
See the table in the link below. Add the 5.5A for the CPU to about another 5 to 10A@+12V for the board, RAM drives, etc, Then add the Amps from the chart to that total to arrive at the needed Amps@12V. At some more for power supply waste.
Post the brands and models of any power supply you have available for help choosing the best of the junk. If there are no detailed specs for each rail then don't even consider it. Also, you should get a PSU with ONLY 1 +12V rail, not multiple.