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Among all the PC components, the power supply is the most dangerous.

It converts the 240V wall voltage into smaller 12V, 5V and 3.3V DC allocations required by the PC. Usually, the power supply comes with the cabinet and is backed

by a warranty so you shouldn’t have problems. However, it pays to be careful and take the extra effort to verify the quality of the power supply. If you are purchasing it separately, opt for a brand name. Check around with your friends, the Internet and other system builders. Horror stories of faulty PSUs that blow up and ruin entire PCs are common, so be careful. A good quality PSU will not only give your system a long life span, it will also help reduce the noise and heat generated inside the cabinet.