Power Supply Flashcards
What is the primary purpose of a power supply unit (PSU)?
To convert AC power from the outlet to DC power for computer components.
What are common wattage ranges for desktop power supplies?
From 300W to 1200W, depending on the system’s requirements.
What is the 80 PLUS certification for power supplies?
A certification indicating the efficiency of the PSU (e.g., Bronze, Silver, Gold).
What is the purpose of a modular power supply?
Allows you to connect only the cables you need for better cable management.
What is the difference between modular, semi-modular, and non-modular PSUs?
Modular allows all cables to be disconnected; semi-modular has some fixed cables; non-modular has all fixed cables.
What is the purpose of the 24-pin ATX connector?
To provide power to the motherboard.
What is the function of the 4/8-pin CPU power connector?
To supply additional power to the CPU.
What is the purpose of PCIe power connectors?
To provide power to high-performance GPUs.
What is the purpose of SATA power connectors?
To supply power to storage devices like HDDs and SSDs.
What is the function of Molex connectors?
To provide power to older devices like optical drives and fans.
What is the role of a PSU fan?
To dissipate heat generated by the power supply.
What is Active PFC (Power Factor Correction) in a PSU?
Improves power efficiency and reduces wasted energy.
What is a dual-rail power supply?
A PSU with multiple 12V rails to distribute power more evenly.
What is the benefit of using a higher-wattage PSU than required?
Provides headroom for future upgrades and ensures stable operation.
What is the purpose of over-voltage and under-voltage protection in a PSU?
To protect components from voltage spikes or drops.
What should you check before replacing a power supply?
Ensure compatibility with the case, connectors, and wattage requirements.
What is the importance of matching PSU wattage to system requirements?
To ensure all components receive adequate power without overloading the PSU.
What should you do before installing or replacing a PSU?
Power off and unplug the system to avoid electrical shock.
What tool is commonly used to secure a PSU in the case?
A screwdriver.
What is a common issue when installing a PSU?
Cables not reaching components due to poor cable management or PSU location.
What is a common symptom of an underpowered PSU?
System instability, unexpected shutdowns, or failure to power on.
What is the purpose of a multimeter when troubleshooting a PSU?
To measure voltage output and ensure the PSU is functioning correctly.
What is a common cause of PSU overheating?
Dust buildup or obstructed airflow.
What should you do if a PSU is making unusual noises?
Inspect for a failing fan or electrical issues and consider replacing the PSU.
What is the significance of a PSU’s efficiency rating?
Higher efficiency means less power is wasted as heat, reducing energy costs.
