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Question: Idle power???

I want to build fast computer but want it to be energy efficient.
Can you let me know how much will be the idle power of the(1)
motherboard Gigabyte GA-H55-USB3 with(2) Core i3 530 Processor(3)
ram(4) and 2.5 drive. I MEAN ABOUT... WITH GOLD POWER SUPLY...
40W 60W 80W???