What are the standard DC voltage levels used in a computer?

The standard DC voltage levels used in a computer primarily consist of 3.3 V, 5 V, and 12 V. These voltage levels correspond to different components of a computer system, with each voltage serving specific functions.

The 3.3 V supply is widely used for logic circuits and some types of memory, such as DDR memory modules, which have become standard in recent years. The 5 V supply is typically used for powering standard internal components like peripheral devices and some motherboard functions. The 12 V supply is crucial for powering larger components, such as CPUs and graphics cards, which require more energy to operate effectively.

Knowing these standard voltages is essential for troubleshooting and performing upgrades or repairs on computer hardware, as using incorrect voltages can lead to component failure or malfunction.