(1) Structure
- Transformer: Converts AC power to lower-voltage DC power.
- Rectifier Circuit: Converts AC to DC.
- Voltage Regulator: Ensures stable power output.
- Cooling Fan: Prevents overheating.
(2) Working Principle
The PSU converts 220V (or 110V) AC power → 12V, 5V, and 3.3V DC to supply power to the motherboard, CPU, GPU, and storage devices.
(3) Classification
| Type | Wattage | Usage |
|---|---|---|
| Basic PSU | 300W – 500W | Office PCs |
| Gaming PSU | 600W – 850W | Gaming, dedicated GPU setups |
| High-End PSU | 1000W+ | Workstations, multi-GPU setups |
(4) Classification Reasons
- Higher wattage supports powerful GPUs (e.g., RTX 4090 requires 850W+).
- 80 PLUS ratings (Bronze, Gold, Platinum, Titanium) affect efficiency and power savings.
