PSU Calculator - PC Power Supply Calculator Online
When choosing a power supply, first consider the total power required by your CPU, GPU and other components, then add some headroom. Select a PSU with rated wattage higher than the total to ensure system stability. This calculator adds 100W headroom and rounds up to the nearest 50W. You may increase further but not recommended to decrease.
PC Power Supply Calculator
If you don't know your hardware's power consumption, check our CPU & GPU Comparison Tool. Other components reference: Fans 3W each, Storage 5W each, RAM 5W each.
Power Supply FAQ
How important is choosing the right PSU wattage?
An underpowered PSU may cause system instability, performance issues, or even hardware damage. Always choose a PSU with sufficient wattage for your system.
What's the difference between 80PLUS White, Bronze, Gold, Platinum?
These are efficiency ratings. Higher efficiency means less power waste and heat. White is basic and cheap; Bronze/Gold offer good value; Platinum/Titanium are for extreme efficiency but more expensive.
Modular vs Non-modular PSUs?
Modular PSUs have detachable cables for cleaner builds. Non-modular are cheaper but harder to manage; Semi/Full modular are better for cable management and aesthetics.
Does PSU brand matter?
Very important. Recommended brands: Seasonic, Super Flower, Delta, Cooler Master, Great Wall, FSP. Avoid cheap no-name PSUs that may damage your components.
What is ATX 3.0?
The new standard improves power delivery, supporting up to 2x total system power and 3x GPU power peaks, preparing for future high-performance hardware.
Other considerations when buying a PSU?
Check required connectors for your components, look for quiet operation (fanless mode at low loads), and ensure physical dimensions fit your case. Product pages usually provide these details.