[adithyagenius]

^^ reread my post. it contains the words "PC's contribution electricity bill"
my pc is a pentium d820 + single ddr2 400 mhz stick + 160gb sata + 7600gt which 232w at full load and 197w at idle. When I bring home my computer from hostel our electricity bill jumps by around rs 900/month. This I know because my father shouts about this everytime I come home. I have checked the trend too. I am assuming people to use their computer less than me. So lets call it Rs 750. For 2 years thats 24*750=18k. 14.3% of it is 0.143*18=2.574k. But I still want to round it down to 2.5k for making it as small as possible. But actually for me its 900*24*.143=Rs3088.
My house bill is only 600 pm when I and my computer are not present. No TV, no ACs. Only tubelights, worldspace and fridge. But for people who have ACs and heaters, the electricity consumption will push the billing to higher slab rates. This can make it even 6k for high electricity bill payers.
I do my calculations before buying a psu.