Newegg Psu Calculator
Estimate the recommended power supply wattage for your PC build based on components like CPU, GPU, and other peripherals.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Newegg PSU Wattage Estimator
- Enter CPU TDP (W): Input the Thermal Design Power of your CPU in watts (e.g., 125). This is a required field.
- Enter GPU TDP (W): Input the TDP of your graphics card in watts (e.g., 250). This is also required.
- Specify other components:
- RAM (stick count): Number of RAM sticks (default 2). Each stick uses 5W.
- Storage Drives: Number of hard drives or SSDs (default 2). Each uses 10W.
- Case Fans: Number of case fans (default 3). Each uses 3W.
- Optional – Overclocking: Check the box if you plan to overclock. This adds 20% headroom to the total.
- Click "Calculate Wattage": The tool sums all component power, adds headroom if overclocking, and rounds up to the nearest 50W (minimum 300W).
- Read the result: The recommended PSU wattage is displayed in bold. A breakdown shows each component’s contribution.
Tip: Use exact TDP values from your CPU/GPU specifications. All inputs are in watts (W) except RAM, storage, and fans which are counts.
Previous Results
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Frequently Asked Questions
The calculator provides an estimate based on typical TDP values. For precise requirements, check component specifications.
Overclocking increases power draw; the calculator adds 20% headroom to account for this.
Most systems require at least 300W to function reliably, even with low-power components.
