In this final excerpt from Scott Mueller's Upgrading And Repairing PCs, 20th Edition, we examine a number of power supply usage factors including power consumption calculations, power savings, power protection systems, and troubleshooting.

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A few months ago, we published a list of the fastest, most powerful graphics cards from their respective generations. This time around we honor the sub-$200 boards that brought great gaming performance to the folks on limited budgets.

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Another year has come and gone. Do you remember everything that happened in 2011? Before you toss out your old calendar, we remember major events, the passing of several technology greats, and a few memorable products that made their way through our lab.

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