Mickey: How does PSU efficiency affect me and do I really need an 80 Plus Gold Power Supply?

First an explanation of what exactly the efficiency of a PSU means.

The efficiency rating on a PSU is simply a rating for how well the PSU converts the AC power it recieves from the outlet to DC power the components of the PC can use.

So, for simplicy sake, lets say your PC components are drawing 100w of power. If you have a PSU that is 80% efficient, it will really draw 125w from the AC outlet.

I've seen people say that you take the Wattage rating of the PSU, and the...

How does PSU efficiency affect me and do I really need an 80 Plus Gold Power Supply?

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