3.5 Power Supply Unit PSU Flashcards
What does a power supply unit (PSU) do?
Converts AC from the wall outlet into low-voltage DC for computer components.
Why are modular PSUs advantageous?
They allow for detachable cables, improving airflow and cable management.
What voltage does a PSU typically output?
3.3V, 5V, and 12V DC.
Why are redundant power supplies used?
To ensure continuous operation in critical systems during PSU failure.
How does a PSU manage heat?
By using built-in fans to expel heat generated during the AC to DC conversion.
What component in a PSU reduces AC voltage to lower levels?
Transformer.
What is the main benefit of using a modular PSU?
Improved airflow and easier cable management.
What type of current does a PSU output, and why is it important?
Direct current (DC), as computer components require a stable and consistent power source.
How can you identify if a motherboard supports redundant power supplies?
It will have dual power supply connections and support a backplane for switching between PSUs.
What safety precautions should you take when installing a PSU?
Ensure the PSU is securely fastened, avoid over-tightening screws, and manage cables to prevent airflow obstruction.
What are the primary power connectors provided by a PSU?
20-pin or 24-pin motherboard connector, 4-pin or 8-pin CPU connector, SATA cables, and PCIe connectors.
Where is a PSU typically installed in a computer case?
At the top or bottom of the case, secured with four screws.
What is the role of a PSU’s built-in fan?
To cool the internal components and dissipate heat from the AC to DC conversion process.
What is the purpose of filters and regulators in a PSU?
To ensure clean and stable DC output for computer components.
When is a redundant PSU setup most useful?
In mission-critical systems like servers, where uninterrupted power is required.
