Final answer:
The power supply unit (PSU) within the system unit converts AC from the wall outlet into the DC required by computer chips, providing crucial voltage regulation to ensure component reliability.
Step-by-step explanation:
The component within the system unit that regulates the wall voltage to the voltages required by the computer chips is known as the power supply unit (PSU).
The PSU converts the alternating current (AC) from the wall outlet into the direct current (DC) that the computer components need.
It provides various DC output voltages appropriate for different computer parts, with common outputs being 3.3V, 5V, and 12V. Ensuring stable and clean power is crucial for the reliability and longevity of computer components.