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#21
Not to miss the point, but I explained to you that the UPS only has to cover the power draw that your PSU would be pulling from the wall. So let's use some examples to make it clear:
Let's say you have a 1200W PSU but your PSU never pulls more than 400W from the wall outlet. What would you get for a UPS? The answer is easy: it should be able to deliver 400W to your PSU at the time of a power outage just in case you're in the middle of whatever it is that causes your PSU to pull 400W from the wall outlet. The capacity of your PSU doesn't matter at all.
Of course, if you had listened to me, then you wouldn't have this good example of Amazon.com's awesomeness.