The power supply unit (PSU) is an important part of all PCs as it supplies power to the entire system. The power supply is divided by how much power they supply, preferably from 400 to 1200 watts. How much you need depends on how powerful or how many processors and graphics cards you have, but 550W holds for most. Furthermore, they are classified by bronze, silver, gold or platinum, which says something about how efficient the power supply is. The precious metal, the more efficient it is, and it emits less waste heat and draws less electricity. A good power supply for mining should be at least 650W and up, gold certification, modular and connection for at least 4 video cards

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