Power requirement calculator

I need to know if 400W will be powerful enough for my new build (see details in my sig).

I am looking for a modular PSU with stable voltages and a reasonably "green" footprint, so it doesn't suck down enormous amounts of power unnecessarily.

Having read a few reviews for this thing, I am pretty impressed by it. Just need to know if 400W would enough to power my new build.

:)
 
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