Power Supply (PSU) Calculator
Estimate the wattage you need for your PC build.
PC Components
Select the components in your build.
Estimated PSU Wattage
Your result will be shown here.
Choosing the Right Power Supply
Selecting an adequate Power Supply Unit (PSU) is critical for a stable and reliable PC build. An underpowered PSU can lead to system crashes, instability, and even damage to components. This calculator provides an estimate of the required wattage by summing the approximate power draw of your selected components and adding a 20% headroom for safety and future upgrades. The result is rounded up to the nearest 50W, which aligns with common PSU manufacturing standards. Always consider an 80 Plus certified PSU for better efficiency.
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