What voltage is typically supplied by power supplies for CPUs?

The correct answer is 3.3 volts because most CPU designs, particularly for modern processors in personal computers, operate off a core voltage around this value. The 3.3-volt supply is commonly used for the logic levels of the processor and is essential for ensuring that the integrated circuits within the CPU function correctly.

In addition to the core voltage, CPUs often require various other voltages for different components. For example, while the CPU may operate primarily at 3.3 volts, other power sources, such as the 12 volts supplied from the power supply unit of a computer, are used to power components like fans and peripherals. The 5-volt supply is often associated with legacy hardware or specific components like USB devices. The 1.5 volts may refer to older memory types or specific processor designs, but it does not generally represent the voltage supplied to CPUs today. Therefore, understanding the power requirements and common voltages for CPUs is crucial for proper computer design and operation.