Computer 101: The PSU

The PSU (Power Supply Unit) is what gives the entire computer the electricity it needs to run. There are many different kinds of PSU’s made by a variety of manufacturers. Usually, after determining what amount of wattage you will need, you will select a PSU based on that amount….and give a little headroom as the amount of voltage your computer will require can vary under load. Also, PSU’s are labeled under an 80 PLUS standard, which determines how energy efficient that PSU is under 20%, 50%, and 100% of the rated load. To put it simply, the better the 80 PLUS level (n/a, bronze, silver, gold, platinum, or titanium) the less amount of total power it will draw.

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