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Questions and Answers
What is the primary function of the transformer in a power supply unit?
What is the purpose of the voltage regulator module (VRM) in a power supply?
What is the primary function of the capacitors in a power supply unit?
What is the purpose of the fan in a power supply unit?
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What does the wattage rating of a power supply unit indicate?
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What does the 80 PLUS certification indicate?
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What is the primary difference between a modular and a non-modular power supply unit?
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Study Notes
Power Supply
Functions:
- Converts Alternating Current (AC) power from the wall outlet to Direct Current (DC) power for computer components
- Regulates voltage to ensure stable power supply
- Provides multiple voltage outputs (e.g., +3.3V, +5V, +12V) for different components
Components:
- Transformer: Steps down AC voltage from the wall outlet
- Rectifier: Converts AC voltage to DC voltage
- Voltage Regulator Module (VRM): Regulates output voltage
- Capacitors: Filter and smooth output voltage
- Fan: Cools the power supply unit (PSU)
Characteristics:
- Wattage: Measured in watts (W); indicates maximum power output
- Efficiency: Measured in percentage (%); indicates how efficiently the PSU converts AC to DC power
- 80 PLUS Certification: Indicates efficiency levels (e.g., Bronze, Silver, Gold, Platinum)
- Modular vs. Non-Modular: Modular PSUs have detachable cables, making cable management easier
Types:
- ATX (ATX12V): Most common type, used in desktop computers
- TFX (Thin Form Factor): Used in small form factor computers
- Server PSU: Used in servers, often with higher wattage and redundancy
- Laptop PSU: Used in laptops, often with lower wattage and compact design
Power Supply Functions
- Converts AC power from the wall outlet to DC power for computer components
- Regulates voltage to ensure stable power supply
- Provides multiple voltage outputs (e.g., +3.3V, +5V, +12V) for different components
Power Supply Components
- Transformer: Steps down AC voltage from the wall outlet
- Rectifier: Converts AC voltage to DC voltage
- Voltage Regulator Module (VRM): Regulates output voltage
- Capacitors: Filter and smooth output voltage
- Fan: Cools the power supply unit (PSU)
Power Supply Characteristics
- Wattage: Measured in watts (W), indicates maximum power output
- Efficiency: Measured in percentage (%), indicates how efficiently the PSU converts AC to DC power
- 80 PLUS Certification: Indicates efficiency levels (e.g., Bronze, Silver, Gold, Platinum)
Power Supply Types
- ATX (ATX12V): Most common type, used in desktop computers
- TFX (Thin Form Factor): Used in small form factor computers
- Server PSU: Used in servers, often with higher wattage and redundancy
- Laptop PSU: Used in laptops, often with lower wattage and compact design
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Description
This quiz covers the functions and components of a power supply in a computer system. It includes AC to DC conversion, voltage regulation, and multiple voltage outputs.
