i have question guys. I need a new 650w PSU. but i visited a store near my house where i found a 650w gold corsair non modulaire PSU has the same price as a corsair 1000w gold fully modulaire PSU, it is discounted by the way. should i get 1000w even thought i don't need the wattage ? will it harm the efficiency or the computer if i don't the whole wattage ??